阅读说明：本技术 内部烯烃磺酸盐组合物和内部烯烃磺酸盐的保存方法 (Internal olefin sulfonate composition and method for preserving internal olefin sulfonate ) 是由 泽瀬加苗 堀宽 栢原顺平 野村真人 于 2018-10-15 设计创作，主要内容包括：本发明提供一种即使在长期保存的情况下色相和气味的稳定性也优异的内部烯烃磺酸盐组合物和内部烯烃磺酸盐的保存方法。本发明的内部烯烃磺酸盐组合物含有内部烯烃磺酸盐、选自碱金属氢氧化物和碱土金属氢氧化物中的一种以上的碱剂以及水,上述碱剂的含量相对于上述内部烯烃磺酸盐1mol为0.2mmol以上且15mmol以下。并且,本发明的内部烯烃磺酸盐的保存方法将内部烯烃磺酸盐至少与碱剂进行混合,制成上述碱剂的含量相对于上述内部烯烃磺酸盐1mol为0.2mmol以上且15mmol以下的组合物。(The present invention provides an internal olefin sulfonate composition having excellent stability of hue and odor even when stored for a long period of time, and a method for storing an internal olefin sulfonate. The internal olefin sulfonate composition of the present invention contains an internal olefin sulfonate, at least one alkali agent selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide, and water, and the content of the alkali agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate. The method for preserving an internal olefin sulfonate of the present invention is a method for preserving an internal olefin sulfonate, which comprises mixing at least an alkaline agent with the internal olefin sulfonate to obtain a composition having a content of the alkaline agent of 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.)

1. An internal olefin sulfonate composition characterized by:

the internal olefin sulfonate composition contains an internal olefin sulfonate and water,

when the content of the internal olefin sulfonate is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, the pH value of the internal olefin sulfonate composition at 25 ℃ is 8.5 or more and 11.0 or less when the content of the internal olefin sulfonate is adjusted to 10 mass% with water.

2. An internal olefin sulfonate composition characterized by:

the internal olefin sulfonate composition contains an internal olefin sulfonate, one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides, and water,

the content of the alkaline agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

3. An internal olefin sulfonate composition according to claim 1 or 2, wherein:

the internal olefin sulfonate composition also contains a buffering agent.

4. An internal olefin sulfonate composition according to claim 3, wherein:

the content of the buffer is 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the internal olefin sulfonate.

5. An internal olefin sulfonate composition according to any one of claims 1 to 4, wherein:

the internal olefin sulfonate composition is also compounded with an acid.

6. An internal olefin sulfonate composition according to any one of claims 1 to 5, wherein:

the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 mass% or more and 80 mass% or less.

7. An internal olefin sulfonate composition according to any one of claims 1 to 6, wherein:

the internal olefin sulfonate has 10 to 24 carbon atoms.

8. A method for preserving an internal olefin sulfonate, characterized by:

in compositions containing an internal olefin sulfonate and water,

adjusting the pH value of the composition at 25 ℃ to 8.5 or more and 11.0 or less when the content of the internal olefin sulfonate in the composition is 10% by mass or less,

when the content of the internal olefin sulfonate in the composition exceeds 10 mass%, the pH of the composition is adjusted so that the pH of a diluted solution obtained by diluting the content of the internal olefin sulfonate with water to 10 mass% becomes 8.5 to 11.0 at 25 ℃.

9. A method for preserving an internal olefin sulfonate, characterized by:

the internal olefin sulfonate is mixed with at least one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides to obtain a composition in which the content of the alkaline agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

10. A method for preserving an internal olefin sulfonate as claimed in claim 8 or 9, wherein:

a buffer is also mixed in the composition.

11. The method for preserving an internal olefin sulfonate as claimed in claim 10, wherein:

the content of the buffer in the composition is 0.01 to 3.0 parts by mass with respect to 100 parts by mass of the internal olefin sulfonate.

12. A method for preserving an internal olefin sulfonate as claimed in any one of claims 8 to 11, wherein:

an acid is also mixed in the composition.

13. A method for preserving an internal olefin sulfonate as claimed in any one of claims 8 to 12, wherein:

the content of the internal olefin sulfonate in the composition is 10 mass% or more and 80 mass% or less.

14. A method for preserving an internal olefin sulfonate as claimed in any one of claims 8 to 13, wherein:

the internal olefin sulfonate has 10 to 24 carbon atoms.

Technical Field

The present invention relates to an internal olefin sulfonate composition useful as a base for a detergent and a method for preserving an internal olefin sulfonate.

Background

Conventionally, anionic surfactants, particularly alkyl sulfates and polyoxyalkylene alkyl ether sulfates, have been widely used as cleaning ingredients for household and industrial use because of their excellent cleaning power and foaming power. As one of the anionic surfactants, olefin sulfonates, particularly internal olefin sulfonates obtained by using, as a raw material, an internal olefin which does not have a terminal olefin but has a double bond inside, have been reported.

The above-mentioned internal olefin sulfonate is generally obtained by sulfonating an internal olefin by reacting it with sulfur trioxide gas, neutralizing the obtained internal olefin sulfonate, and then further hydrolyzing it. In recent years, a detergent containing an internal olefin sulfonate has been found to have good characteristics such as good washability, and is expected to be used in various applications in the future.

For example, patent document 1 proposes an aqueous hair cleansing agent containing the following components (a), (B), and (C) and water, and having a pH value of 2 to 5 at 25 ℃ when diluted to 20 times by mass with water, for the purpose of providing an aqueous hair cleansing agent having excellent performance in all of foaming at the time of cleansing, washability at the time of rinsing, and gloss of hair after drying.

(A) A sulfonate of an internal olefin;

(B) a specific organic solvent;

(C) one or more organic carboxylic acids selected from the group consisting of a hydroxymonocarboxylic acid and a dicarboxylic acid.

In addition, patent document 2 proposes a bactericidal detergent composition having a pH value at 25 ℃ of 4.7 or more and 7.5 or less, which has a high bactericidal effect even when used for a short time and is excellent in foaming, foam quality, and rinsing properties during cleaning, and which contains:

(a) the components: an internal olefin sulfonate having 12 to 18 carbon atoms in an amount of 0.5 to 20 mass%;

(b) the components: 0.1 to 1.0 mass% of an oil-soluble bactericide; and

(c) component (B) L ogP is 2.0 to 4.0% by mass of solvent 0.25 to 7.0% by mass.

Patent document 3 proposes a hand-washing tableware detergent composition containing 1 to 50 mass% of the following component (a), 0.5 to 5 mass% of the following component (b), and the following component (c), wherein the mass ratio of component (c)/component (a) is 0.01 to 1.

(a) The components: an internal olefin sulfonate having 8 to 24 carbon atoms,

(b) the components: a fatty acid having 8 to 22 carbon atoms or a salt thereof,

(c) the components: one or more compounds selected from the following (c1), (c2) and (c 3):

(c1) the method comprises the following steps An alkyl or alkenyl alkanolamide having an alkyl or alkenyl group having 8 to 22 carbon atoms;

(c2) the method comprises the following steps A fatty acid amide propyl betaine having an alkyl group or alkenyl group having 7 to 21 carbon atoms;

(c3) the method comprises the following steps A polyoxyethylene alkyl or alkenyl amine having an alkyl or alkenyl group having 8 to 22 carbon atoms.

Disclosure of Invention

Technical problem to be solved by the invention

However, when a conventional composition containing an internal olefin sulfonate is stored for a long period of time, the hue may be deteriorated or the odor may be intensified.

The present invention provides an internal olefin sulfonate composition having excellent stability of hue and odor even when stored for a long period of time, and a method for storing an internal olefin sulfonate.

Technical solution for solving technical problem

The reason why the hue is deteriorated or the odor is intensified when the composition containing the internal olefin sulfonate is stored for a long period of time is not clear, but it is considered that the reason is that: during storage, the internal olefin sulfonate and the like in the composition are oxidized, decomposed, bonded, polymerized, and the like. Also, the inventors of the present invention found that: by controlling the pH of the composition containing an internal olefin sulfonate or controlling the content of an alkaline agent in the composition containing an internal olefin sulfonate, an internal olefin sulfonate composition excellent in stability of hue and odor even in long-term storage can be obtained.

That is, the present invention relates to an internal olefin sulfonate composition containing an internal olefin sulfonate and water, wherein when the content of the internal olefin sulfonate is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, and the content of the internal olefin sulfonate is adjusted to 10 mass% with water, the pH value of the internal olefin sulfonate composition at 25 ℃ is 8.5 or more and 11.0 or less.

The present invention also relates to an internal olefin sulfonate composition containing an internal olefin sulfonate, at least one alkali agent selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide, and water, wherein the content of the alkali agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

In addition, the present invention relates to a method for preserving an internal olefin sulfonate, which comprises adding an internal olefin sulfonate and water to a composition containing the internal olefin sulfonate,

when the content of the internal olefin sulfonate in the composition is 10% by mass or less, the pH value of the composition at 25 ℃ is adjusted to 8.5 or more and 11.0 or less,

when the content of the internal olefin sulfonate in the composition exceeds 10 mass%, the pH of the composition is adjusted so that the pH of a diluted solution obtained by diluting the content of the internal olefin sulfonate with water to 10 mass% becomes 8.5 to 11.0 at 25 ℃.

The present invention also relates to a method for storing an internal olefin sulfonate, which comprises mixing an internal olefin sulfonate with at least one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides to obtain a composition having a content of the alkaline agent of 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

Effects of the invention

The internal olefin sulfonate composition of the present invention is a composition which is less likely to change in hue and odor even when stored for a long period of time and has excellent stability. Thus, the internal olefin sulfonate composition of the present invention is useful as a base for various detergents. In addition, according to the method for preserving an internal olefin sulfonate of the present invention, the quality of the internal olefin sulfonate can be stabilized for a long period of time.

Detailed Description

The internal olefin sulfonate composition of the present invention contains an internal olefin sulfonate and water, and when the content of the internal olefin sulfonate is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, and the content of the internal olefin sulfonate is adjusted to 10 mass% with water, the pH value of the internal olefin sulfonate composition at 25 ℃ is 8.5 or more and 11.0 or less. In addition, the reason why the content of the internal olefin sulfonate is adjusted to 10 mass% by water when the content of the internal olefin sulfonate exceeds 10 mass% is that: when the concentration of the internal olefin sulfonate becomes high, the internal olefin sulfonate composition becomes high in viscosity, and it is difficult to measure the pH of the composition.

The internal olefin sulfonate composition of the present invention contains an internal olefin sulfonate, at least one alkali agent selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide, and water, and the content of the alkali agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

The internal olefin sulfonate can be obtained by, for example, sulfonating, neutralizing and hydrolyzing an internal olefin (an olefin having a double bond in the interior of an olefin chain) as a raw material, and quantitatively generating β -sultone, β -sultone, and a part of which is converted into γ -sultone and olefin sulfonic acid, and further converted into hydroxyalkane sulfonate and olefin sulfonate in the neutralization and hydrolysis steps (for example, j.am.oil chem.soc.69,39 (1992)).

From the viewpoint of cleaning performance and the like, the number of carbon atoms of the internal olefin sulfonate is preferably 10 or more, more preferably 12 or more, further preferably 14 or more, further preferably 16 or more, and further preferably 24 or less, more preferably 22 or less, further preferably 20 or less, and further preferably 18 or less. One internal olefin sulfonate may be used, or two or more internal olefin sulfonates having different carbon atoms may be used in combination.

In the case where the internal olefin sulfonate is a mixture containing hydroxyalkane sulfonate and olefin sulfonate, the mass ratio of the content of hydroxyalkane sulfonate to the content of olefin sulfonate (hydroxymer/olefin) is preferably 40/60 to 95/5, more preferably 60/40 to 90/10, further preferably 70/30 to 88/12, and further preferably 75/25 to 86/14 from the viewpoints of cleaning performance and foaming performance.

The internal olefin sulfonate includes an internal olefin sulfonate having a 2-position sulfonic acid group in a proportion of preferably 6.8% by mass or more, more preferably 8.6% by mass or more, still more preferably 11.3% by mass or more, and still more preferably 13.1% by mass or more, and an internal olefin sulfonate having a 2-position sulfonic acid group in a proportion of preferably 24.9% by mass or less, more preferably 24.0% by mass or less, still more preferably 23.1% by mass or less, still more preferably 22.2% by mass or less, still more preferably 21.3% by mass or less, still more preferably 20.4% by mass or less, still more preferably 19.5% by mass or less, and still more preferably 18.6% by mass or less, from the viewpoints of cleaning performance and foaming performance. The content of the internal olefin sulfonate having a sulfonic acid group at the 2-position can be measured by gas chromatography.

The internal olefin sulfonate includes an olefin sulfonate having a double bond at the end of a carbon chain, preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.5% by mass or more, and still further preferably 1.0% by mass or more, and further includes an olefin sulfonate having a double bond at the end of a carbon chain, preferably 10% by mass or less, more preferably 5.3% by mass or less, further preferably 5.0% by mass or less, still further preferably 4.7% by mass or less, still further preferably 4.4% by mass or less, still further preferably 4.1% by mass or less, still further preferably 3.7% by mass or less, still further preferably 3.4% by mass or less, and still further preferably 3.1% by mass or less, from the viewpoints of reduction in production cost and improvement in productivity.

The internal olefin sulfonate can be produced by a known production method such as sulfonation, neutralization, and hydrolysis of the internal olefin. Hereinafter, each step will be specifically described.

[ sulfonation procedure ]

The sulfonation step is a step of reacting internal olefin with sulfur trioxide to obtain a sulfonated product.

In order to obtain the internal olefin sulfonate, the internal olefin includes an internal olefin in which the double bond position is 2-position, preferably 10% by mass or more, more preferably 13% by mass or more, further preferably 18% by mass or more, further preferably 21% by mass or more, further preferably 42% by mass or less, more preferably 41% by mass or less, further preferably 39% by mass or less, further preferably 37% by mass or less, further preferably 36% by mass or less, further preferably 34% by mass or less, further preferably 33% by mass or less, further preferably 31% by mass or less.

The internal olefin can be produced by a known method, for example, a method described in international publication No. 2011/052732.

The sulfur trioxide is not particularly limited, and sulfur trioxide gas is preferably used from the viewpoint of enhancing reactivity.

The reaction molar ratio of sulfur trioxide to internal olefin is preferably 0.9 or more, more preferably 0.95 or more, and even more preferably 0.98 or more from the viewpoint of reducing the amount of impurities, and is preferably 1.1 or less, more preferably 1.05 or less, and even more preferably 1.03 or less from the viewpoint of reducing the amount of impurities and suppressing excessive reaction.

[ neutralization step ]

The neutralization step is a step of reacting the obtained sulfonate with an alkaline agent to obtain a neutralized product.

Examples of the alkaline agent used for neutralization include inorganic alkaline compounds. Examples of the inorganic basic compound include: alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkaline earth metal hydroxides such as magnesium hydroxide and calcium hydroxide; alkali metal carbonates such as sodium carbonate and potassium carbonate. One of these may be used, or two or more of these may be used in combination.

From the viewpoint of availability and economy, the alkali agent is preferably one or more selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides, more preferably an alkali metal hydroxide, and still more preferably sodium hydroxide or potassium hydroxide.

The alkaline agent may be used in the form of a solid or an aqueous solution. From the viewpoint of handling and productivity, an aqueous solution is preferred.

The amount of the alkali agent to be added is preferably 1.02 times by mole or more, more preferably 1.03 times by mole or more, further preferably 1.04 times by mole or more, and further preferably 1.5 times by mole or less, more preferably 1.3 times by mole or less, and further preferably 1.1 times by mole or less, based on the theoretical acid value of the sulfonated substance.

The treatment temperature in the neutralization step is preferably 0 ℃ or higher, more preferably 10 ℃ or higher, and still more preferably 20 ℃ or higher from the viewpoint of improvement in reactivity, and is preferably 60 ℃ or lower, and more preferably 40 ℃ or lower from the viewpoint of suppression of side reactions.

The treatment time in the neutralization step is preferably 5 minutes or more, more preferably 15 minutes or more, and still more preferably 30 minutes or more from the viewpoint of completion of the reaction, and is preferably 5 hours or less, more preferably 2 hours or less, and still more preferably 90 minutes or less from the viewpoint of economy and the like.

[ hydrolysis step ]

The hydrolysis step is a step of hydrolyzing the obtained neutralized product.

In the hydrolysis step, the temperature at the time of hydrolysis is preferably 120 ℃ or higher, more preferably 140 ℃ or higher, and even more preferably 160 ℃ or higher from the viewpoint of improvement in reactivity, and is preferably 220 ℃ or lower, and more preferably 180 ℃ or lower from the viewpoint of suppression of decomposition of the product.

The treatment time in the hydrolysis step is preferably 30 minutes or more, more preferably 45 minutes or more from the viewpoint of completing the reaction, and is preferably 4 hours or less, more preferably 3 hours or less, further preferably 2 hours or less, and further preferably 90 minutes or less from the viewpoint of improving productivity.

An aqueous solution containing an internal olefin sulfonate can be obtained by the hydrolysis step. If necessary, treatments such as desalting, decoloring and reduction are also performed. In addition, the internal olefin sulfonate may also be obtained from an aqueous solution containing the internal olefin sulfonate by performing an extraction operation or the like.

The internal olefin sulfonate composition of the present invention contains one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides. From the viewpoint of availability and economy, the alkali agent is preferably an alkali metal hydroxide, and more preferably sodium hydroxide or potassium hydroxide.

From the viewpoint of color and odor stability during storage, the content of the one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is 0.2mmol or more, preferably 1.5mmol or more, more preferably 2.5mmol or more, further preferably 5mmol or more, and further preferably 15mmol or less, and preferably 10mmol or less, based on 1mol of the internal olefin sulfonate. The content of the alkali agent can be adjusted to a target range by adding an internal olefin sulfonate or an alkali agent to the internal olefin sulfonate composition as needed. The content of the alkaline agent in the internal olefin sulfonate composition can be determined by neutralization titration.

In addition, the internal olefin sulfonate composition of the present invention preferably contains an alkali agent in order to adjust the pH value at 25 ℃ of the internal olefin sulfonate composition of the present invention to 8.5 or more and 11.0 or less when the content of the internal olefin sulfonate is 10 mass% or less or when the content of the internal olefin sulfonate exceeds 10 mass% and the content is adjusted to 10 mass% by water. The alkaline agent is not particularly limited, and may be the above alkaline agent, or may be another alkaline agent.

The internal olefin sulfonate composition contains water (ion-exchanged water or the like).

The internal olefin sulfonate composition of the present invention is liquid (including paste-like), and the production method thereof is not particularly limited, and for example, it may be produced using an aqueous solution containing the internal olefin sulfonate, or may be produced by mixing the internal olefin sulfonate, water (ion-exchanged water, etc.), the alkali agent, and the like.

The content of the internal olefin sulfonate in the internal olefin sulfonate composition is preferably 10% by mass or more, more preferably 20% by mass or more, further preferably 25% by mass or more, further preferably 30% by mass or more, further preferably more than 30% by mass, further preferably 32% by mass or more, further preferably 36% by mass or more, further preferably 40% by mass or more, and from the viewpoint of handling properties, preferably 80% by mass or less, more preferably 70% by mass or less, from the viewpoint of color and odor stability during storage. When the content of the internal olefin sulfonate is outside the above range, the content of the internal olefin sulfonate may be adjusted by mixing water (ion-exchange water or the like) into the composition or by concentrating the composition. The content of the internal olefin sulfonate in the internal olefin sulfonate composition can be determined by a flow potential method.

The content of water (ion-exchanged water or the like) in the internal olefin sulfonate composition is preferably an amount that becomes the remaining portion other than the above components, and is preferably 17% by mass or more, and more preferably 27% by mass or more from the viewpoint of handling, and is preferably 89% by mass or less, more preferably 79% by mass or less, further preferably 74% by mass or less, further preferably 68% by mass or less, and further preferably 58% by mass or less from the viewpoint of color and odor stability during storage.

From the viewpoint of stability of hue and odor during storage, when the content of the internal olefin sulfonate composition is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, the internal olefin sulfonate composition is diluted to 10 mass% with water (ion-exchanged water or the like), and the pH value at 25 ℃ of the internal olefin sulfonate composition is preferably 8.5 or more, more preferably 9.0 or more, further preferably 9.4 or more, still further preferably 9.8 or more, and further preferably 11.0 or less, and still further preferably 10.5 or less. The pH can be adjusted by, for example, adding the alkali agent, the buffer, and the acid.

The internal olefin sulfonate composition preferably contains a buffer from the viewpoints of stability of hue and odor during storage and maintenance of the pH value within the above range.

The buffer is not particularly limited, and examples thereof include: carbonates such as sodium carbonate and potassium carbonate; bicarbonates such as sodium bicarbonate and potassium bicarbonate; borates such as sodium borate and potassium borate; silicates such as sodium silicate and potassium silicate. These may be used alone or in combination of two or more. Among these, from the viewpoint of availability and economy, carbonate is preferable, and sodium carbonate is more preferable.

From the viewpoint of keeping the pH value within the above range, the content of the buffer is preferably 0.01 part by mass or more, more preferably 0.05 part by mass or more, and still more preferably 0.1 part by mass or more, relative to 100 parts by mass of the internal olefin sulfonate, and from the viewpoint of reducing the amount of impurities, is preferably 3.0 parts by mass or less, more preferably 2.5 parts by mass or less, still more preferably 2.0 parts by mass or less, still more preferably 1.0 part by mass or less, and still more preferably 0.5 parts by mass or less.

The internal olefin sulfonate composition does not need to be particularly added with a stabilizer such as an acid, but an acid may be added to adjust the pH to the above range in order to adjust the content of the alkali agent. The acid is present in the composition in the form of an acid salt.

The acid is not particularly limited, and examples thereof include: inorganic acids such as sulfuric acid, hydrochloric acid, phosphoric acid, and boric acid; organic acids such as citric acid, malic acid, maleic acid, fumaric acid, and succinic acid. These may be used alone or in combination of two or more. Among these, citric acid, phosphoric acid and boric acid are preferable, and citric acid is more preferable.

The amount of the acid to be added may be appropriately adjusted so that the pH value falls within the above range. The amount of the acid to be blended is preferably 10 parts by mass or less, more preferably 1 part by mass or less, further preferably 0.1 part by mass or less, and further preferably 0.01 part by mass or less, per 100 parts by mass of the internal olefin sulfonate.

The internal olefin sulfonate composition may contain an anionic surfactant or a nonionic surfactant from the viewpoint of storage stability or viscosity adjustment.

Examples of the anionic surfactant include: c10-22 sulfate ester salts such as C10-22 alkyl sulfate, C10-22 alkenyl sulfate, C10-22 polyoxyalkylene alkyl ether sulfate, C10-22 polyoxyalkylene alkenyl ether sulfate, C10-22 polyoxyalkylene alkyl phenyl ether sulfate, and the like; c10-22 sulfonates such as C10-22 alkyl sulfosuccinates, C10-22 polyoxyalkylene alkyl sulfosuccinates, C10-22 alkane sulfonates, C10-22 acyl isethionates, C10-22 acyl taurates, C10-22 alkyl sulfoacetates, and the like; c10-22 carboxylates such as C10-22 fatty acid salts, C10-22 polyoxyalkylene alkyl ether carboxylates, C10-22 polyoxyalkylene alkenyl ether carboxylates, C10-22 polyoxyalkylene alkylphenyl ether carboxylates, and the like; c10-22 phosphate ester salts such as C10-22 alkyl phosphate and C10-22 polyoxyalkylene alkyl ether phosphate; and amino acid salts having an acyl group having 10 to 22 carbon atoms such as acyl glutamate, acyl alanine salt, acyl glycinate, acyl sarcosinate, acyl arginine salt, and the like. These may be used alone or in combination of two or more.

Examples of the nonionic surfactant include: a polyalkylene glycol-type nonionic surfactant such as a C10-22 polyoxyalkylene alkyl ether, a polyoxyethylene sorbitan fatty acid ester, a polyoxyethylene sorbitol fatty acid ester, a polyoxyethylene glycerin fatty acid ester, a polyoxyethylene fatty acid ester, a C10-22 polyoxyethylene alkylphenyl ether, a C10-22 polyoxyalkylene (hardened) castor oil, or the like; polyhydric alcohol type nonionic surfactants such as sucrose fatty acid esters, polyglycerol alkyl ethers having 10 to 22 carbon atoms, polyglycerol fatty acid esters, alkyl glycosides having 10 to 22 carbon atoms, and acylated alkyl glucamides; fatty acid alkanolamides, and the like. The fatty acid or acyl group of the nonionic surfactant represents a fatty acid having 10 to 22 carbon atoms. Specifically, for example, there may be mentioned: fatty acid monoalkanolamides such as coconut oil fatty acid monoethanolamide and coconut oil fatty acid N-methyl monoethanolamide. These may be used alone or in combination of two or more.

The internal olefin sulfonate composition may also contain a hydrotrope for improved storage stability.

Examples of hydrotropes include: toluene sulfonic acid, xylene sulfonic acid, cumene sulfonic acid, and salts thereof (sodium salt, potassium salt, magnesium salt, amine salt, and the like). These may be used alone or in combination of two or more.

The internal olefin sulfonate composition may contain a solvent from the viewpoint of storage stability or viscosity adjustment.

Examples of the solvent include: ethanol, isopropanol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerol, isoprene glycol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, 3-methyl-3-methoxybutanol, phenoxyethanol, phenyl glycol, phenoxyisopropanol, diethylene glycol butyl ether (diethylene glycol monobutyl ether), diethylene glycol dibutyl ether, benzyl alcohol, and the like. These may be used alone or in combination of two or more.

The internal olefin sulfonate composition preferably has a hue change rate of 5% or less, more preferably 3% or less, and still more preferably 2% or less, before and after being stored at 50 ℃ for 20 days.

As described above, in the method for storing an internal olefin sulfonate according to the present invention, in a composition containing an internal olefin sulfonate and water, when the content of the internal olefin sulfonate in the composition is 10 mass% or less, the pH of the composition at 25 ℃ is adjusted to 8.5 or more and 11.0 or less, and when the content of the internal olefin sulfonate in the composition exceeds 10 mass%, the pH of the composition is adjusted so that the pH of a diluted solution obtained by diluting the content of the internal olefin sulfonate with water to 10 mass% becomes 8.5 or more and 11.0 or less at 25 ℃. By adjusting the pH to 8.5 or more and 11.0 or less, the storage stability of the internal olefin sulfonate can be improved. In addition, the reason why the content of the internal olefin sulfonate is diluted to 10 mass% with water when the content exceeds 10 mass% is that: when the concentration of the internal olefin sulfonate becomes high, the internal olefin sulfonate composition becomes high in viscosity, and it is difficult to measure the pH of the composition.

As described above, the method for storing an internal olefin sulfonate of the present invention is a method for storing an internal olefin sulfonate, which comprises mixing an internal olefin sulfonate with at least one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides to obtain a composition having a content of the alkali agent of 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate. By mixing the internal olefin sulfonate with the alkali agent to prepare a composition in which the content of the alkali agent is adjusted to the above range, the storage stability of the internal olefin sulfonate can be improved.

The components and their contents in the composition and the pH of the composition are the same as those described above, and therefore, the description thereof is omitted.

The internal olefin sulfonate composition of the present invention can be used as a base for a hard surface cleaner such as a dish cleaner and a house cleaner, a laundry treatment agent, a laundry softener, a body cleaner, a hair cleaner, and the like, and can be used for producing them.

The detergent for tableware of the present invention is used for example for cleaning of plastics, glass, pottery, stainless steel, wood, sponge, chopping board, cooking table, table and chair, etc., preferably for cleaning of hard surface where coloring or smell etc. are problematic, preferably for cleaning of plastics, glass, pottery, sponge, chopping board, cooking table, table and chair.

The household cleaning agent of the present invention is used for cleaning, for example, plastic, glass, pottery, stainless steel, wood, paper, leather, rubber, walls, floors, bathtubs, sinks, toilets, windows, and the like, preferably for cleaning hard surfaces where coloring or odor is a problem, and preferably for cleaning plastic, glass, pottery, paper, walls, floors, bathtubs, toilets, and the like.

The hard surface cleaner such as a dish cleaner or a household cleaner, a laundry treatment agent, a laundry softener, a body cleaner and a hair cleaner may contain known components, for example, a surfactant other than the internal olefin sulfonate and an auxiliary agent, together with the internal olefin sulfonate composition of the present invention. Examples of auxiliaries include: foaming agent, antifoaming agent, polymer, oil agent, hydrophilic solvent, silicone, humectant, preservative, viscosity regulator, antiseptic, antibacterial agent, anti-dandruff agent, anti-inflammatory agent, antioxidant, ultraviolet absorber, metal ion blocking agent, pearling agent, pigment, perfume, enzyme, bleaching agent, bleaching activator, chelating agent, water-soluble salt, polyvalent cation, pH regulator, etc. One or more of the above-mentioned auxiliaries are used depending on the purpose.

The content of the surfactant (including the internal olefin sulfonate) in the hard surface cleaner, the household cleaner, or the dish cleaner is not particularly limited, but is preferably 0.5% by mass or more, more preferably 15% by mass or more, and preferably 60% by mass or less, more preferably 30% by mass or less.

The hard surface cleaner, the household cleaner, or the tableware cleaner preferably contains a pH adjuster (e.g., citric acid). The content of the pH adjuster in the hard surface cleaner, the household cleaner, or the dish cleaner is not particularly limited, but is preferably 0.001 mass% or more, more preferably 8 mass% or less, and even more preferably 5 mass% or less.

The present invention and preferred embodiments of the present invention are described below.

＜1＞

An internal olefin sulfonate composition which contains an internal olefin sulfonate and water, wherein when the content of the internal olefin sulfonate is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, and the content of the internal olefin sulfonate is adjusted to 10 mass% with water, the pH value of the internal olefin sulfonate composition at 25 ℃ is 8.5 or more and 11.0 or less.

＜2＞

An internal olefin sulfonate composition comprising an internal olefin sulfonate, at least one alkali agent selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide, and water, wherein the content of the alkali agent is 0.2mmol to 15mmol relative to 1mol of the internal olefin sulfonate.

＜3＞

The internal olefin sulfonate composition according to < 1 > or < 2 >, wherein the internal olefin sulfonate has preferably 10 or more, more preferably 12 or more, further preferably 14 or more, further preferably 16 or more, and further preferably 24 or less, more preferably 22 or less, further preferably 20 or less, further preferably 18 or less carbon atoms.

＜4＞

The internal olefin sulfonate composition according to < 1 > to < 3 >, wherein, in the case where the internal olefin sulfonate is a mixture containing a hydroxyalkane sulfonate and an olefin sulfonate, the mass ratio (hydroxymer/olefin) of the content of the hydroxyalkane sulfonate to the content of the olefin sulfonate is preferably 40/60 to 95/5, more preferably 60/40 to 90/10, still more preferably 70/30 to 88/12, and still more preferably 75/25 to 86/14.

＜5＞

The internal olefin sulfonate composition according to any one of < 1 > to < 4 >, wherein the internal olefin sulfonate contains an internal olefin sulfonate having a sulfonic acid group at a position of 2-position, which is preferably 6.8% by mass or more, more preferably 8.6% by mass or more, further preferably 11.3% by mass or more, further preferably 13.1% by mass or more, further preferably 24.9% by mass or less, more preferably 24.0% by mass or less, further preferably 23.1% by mass or less, further preferably 22.2% by mass or less, further preferably 21.3% by mass or less, further preferably 20.4% by mass or less, further preferably 19.5% by mass or less, further preferably 18.6% by mass or less.

＜6＞

The internal olefin sulfonate composition according to any one of < 1 > to < 5 >, wherein the internal olefin sulfonate contains an olefin sulfonate having a double bond at the end of a carbon chain of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.5% by mass or more, further preferably 1.0% by mass or more, further preferably 10% by mass or less, more preferably 5.3% by mass or less, further preferably 5.0% by mass or less, further preferably 4.7% by mass or less, further preferably 4.4% by mass or less, further preferably 4.1% by mass or less, further preferably 3.7% by mass or less, further preferably 3.4% by mass or less, and further preferably 3.1% by mass or less.

＜7＞

The internal olefin sulfonate composition according to any one of < 2 > to < 6 >, wherein the above-mentioned alkali agent is preferably an alkali metal hydroxide, more preferably sodium hydroxide or potassium hydroxide.

＜8＞

The internal olefin sulfonate composition according to any one of < 2 > to < 7 >, wherein the content of the one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 1.5mmol or more, more preferably 2.5mmol or more, further preferably 5mmol or more, and further preferably 10mmol or less, relative to 1mol of the internal olefin sulfonate.

＜9＞

The internal olefin sulfonate composition according to any one of < 1 > to < 8 >, wherein the content of the internal olefin sulfonate in the internal olefin sulfonate composition is preferably 10% by mass or more, more preferably 18% by mass or more, further preferably 20% by mass or more, further preferably 25% by mass or more, further preferably 30% by mass or more, further preferably more than 30% by mass, further preferably 32% by mass or more, further preferably 36% by mass or more, further preferably 40% by mass or more, and further preferably 80% by mass or less, more preferably 70% by mass or less.

＜10＞

An internal olefin sulfonate composition as described in any of < 2 > to < 7 >, wherein,

preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 1.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 mass% or more and 80 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 2.5mmol or more and 10mmol or less based on 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 30 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is more than 30 mass% and 70 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 36 mass% or more and 70 mass% or less,

more preferably: the content of the one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, and the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 mass% to 70 mass%.

＜11＞

The internal olefin sulfonate composition according to any one of < 1 > to < 10 >, wherein the content of water in the internal olefin sulfonate composition is preferably 17% by mass or more, more preferably 27% by mass or more, and further preferably 89% by mass or less, more preferably 79% by mass or less, further preferably 74% by mass or less, further preferably 68% by mass or less, and further preferably 58% by mass or less.

＜12＞

An internal olefin sulfonate composition as described in any of < 1 > to < 8 >, wherein,

preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 to 80 mass%, the content of water in the internal olefin sulfonate composition is 17 to 89 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 to 70 mass%, the content of water in the internal olefin sulfonate composition is 27 to 79 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 to 70 mass%, the content of water in the internal olefin sulfonate composition is 27 to 74 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 30 to 70 mass%, the content of water in the internal olefin sulfonate composition is 27 to 68 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is more than 30 mass% and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 to 70 mass%, the content of water in the internal olefin sulfonate composition is 27 to 58 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 36 to 70 mass%, the content of water in the internal olefin sulfonate composition is 27 to 58 mass%,

more preferably: the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 mass% or more and 70 mass% or less, and the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less.

＜13＞

An internal olefin sulfonate composition as described in any of < 2 > to < 7 >, wherein,

preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 1.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 mass% or more and 80 mass% or less, the content of water in the internal olefin sulfonate composition is 17 mass% or more and 89 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 2.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 79 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 74 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 30 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 68 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is more than 30 mass% and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 36 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 mass% or more and 70 mass% or less, and the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less.

＜14＞

The internal olefin sulfonate composition according to any one of < 2 > to < 13 >, wherein when the content of the internal olefin sulfonate is 10 mass% or less, or when the content of the internal olefin sulfonate exceeds 10 mass%, the internal olefin sulfonate composition is diluted with water to 10 mass%, and the pH value of the internal olefin sulfonate composition at 25 ℃ is preferably 8.5 or more, more preferably 9.0 or more, still more preferably 9.4 or more, still more preferably 9.8 or more, and further preferably 11.0 or less, and still more preferably 10.5 or less.

＜15＞

An internal olefin sulfonate composition according to any one of < 1 > to < 14 >, wherein the internal olefin sulfonate composition preferably contains a buffer.

＜16＞

An internal olefin sulfonate composition as described in < 15 > wherein the buffering agent is preferably a carbonate salt, more preferably sodium carbonate.

＜17＞

The internal olefin sulfonate composition according to < 15 > or < 16 >, wherein the content of the buffer is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, further preferably 0.1 parts by mass or more, and further preferably 3.0 parts by mass or less, more preferably 2.5 parts by mass or less, further preferably 2.0 parts by mass or less, further preferably 1.0 parts by mass or less, further preferably 0.5 parts by mass or less, relative to 100 parts by mass of the internal olefin sulfonate.

＜18＞

An internal olefin sulfonate composition as described in any of < 2 > to < 7 >, wherein,

preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 1.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 mass% or more and 80 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.01 parts by mass or more and 3.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 2.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.05 parts by mass or more and 2.5 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 30 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is more than 30 mass% and 70 mass% or less, the internal olefin sulfonate composition contains a buffer in an amount of 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 36 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 mass% or more and 70 mass% or less, the internal olefin sulfonate composition contains a buffer, and the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate.

＜19＞

An internal olefin sulfonate composition as described in any of < 1 > to < 8 >, wherein,

preferably: the internal olefin sulfonate composition contains a buffering agent in an amount of 0.01 to 3.0 parts by mass per 100 parts by mass of the internal olefin sulfonate,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.05 to 2.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the amount of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 to 70% by mass, the amount of water in the internal olefin sulfonate composition is 27 to 79% by mass,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 2.0 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 to 70% by mass, the content of water in the internal olefin sulfonate composition is 27 to 74% by mass,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 1.0 parts by mass per 100 parts by mass of the internal olefin sulfonate, the amount of the internal olefin sulfonate in the internal olefin sulfonate composition being 30 to 70% by mass, the amount of water in the internal olefin sulfonate composition being 27 to 68% by mass,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 to 70% by mass, the content of water in the internal olefin sulfonate composition is 27 to 58% by mass,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, the amount of the internal olefin sulfonate in the internal olefin sulfonate composition being 36 to 70% by mass, the amount of water in the internal olefin sulfonate composition being 27 to 58% by mass,

more preferably: the internal olefin sulfonate composition contains a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the amount of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 to 70% by mass, the amount of water in the internal olefin sulfonate composition is 27 to 58% by mass, and the amount of the buffer is 0.1 to 0.5 parts by mass.

＜20＞

An internal olefin sulfonate composition as described in any of < 2 > to < 7 >, wherein,

preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 1.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 10 mass% or more and 80 mass% or less, the content of water in the internal olefin sulfonate composition is 17 mass% or more and 89 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.01 parts by mass or more and 3.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 2.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 20 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 79 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.05 parts by mass or more and 2.5 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 25 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 74 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 parts by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 30 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 68 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is more than 30 mass% and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 32 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 36 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less, the internal olefin sulfonate composition contains a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the internal olefin sulfonate composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the internal olefin sulfonate composition is 40 mass% or more and 70 mass% or less, the content of water in the internal olefin sulfonate composition is 27 mass% or more and 58 mass% or less, the internal olefin sulfonate composition contains a buffer, and the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate.

＜21＞

The internal olefin sulfonate composition according to any one of < 1 > to < 20 >, wherein the internal olefin sulfonate composition is preferably compounded with an acid.

＜22＞

The internal olefin sulfonate composition according to < 21 > wherein the acid is preferably citric acid, phosphoric acid, boric acid, more preferably citric acid.

＜23＞

The internal olefin sulfonate composition according to < 21 > or < 22 >, wherein the amount of the acid is preferably 10 parts by mass or less, more preferably 1 part by mass or less, further preferably 0.1 part by mass or less, and further preferably 0.01 part by mass or less, per 100 parts by mass of the internal olefin sulfonate.

＜24＞

The internal olefin sulfonate composition according to any one of < 1 > to < 23 >, wherein the internal olefin sulfonate composition contains one or more surfactants selected from the group consisting of anionic surfactants and nonionic surfactants.

＜25＞

An internal olefin sulfonate composition according to any one of < 1 > to < 24 > wherein said internal olefin sulfonate composition contains a hydrotrope.

＜26＞

An internal olefin sulfonate composition according to any one of < 1 > to < 25 >, wherein the internal olefin sulfonate composition contains a solvent.

＜27＞

The internal olefin sulfonate composition according to any one of < 1 > to < 26 >, wherein the change rate of hue of the internal olefin sulfonate composition before and after storage at 50 ℃ for 20 days is preferably 5% or less, more preferably 3% or less, and still more preferably 2% or less.

＜28＞

A method for preserving an internal olefin sulfonate, which comprises adding an internal olefin sulfonate and water to a composition containing the internal olefin sulfonate,

when the content of the internal olefin sulfonate in the composition is 10% by mass or less, the pH value of the composition at 25 ℃ is adjusted to 8.5 or more and 11.0 or less,

when the content of the internal olefin sulfonate in the composition exceeds 10 mass%, the pH of the composition is adjusted so that the pH of a diluted solution obtained by diluting the content of the internal olefin sulfonate with water to 10 mass% becomes 8.5 to 11.0 at 25 ℃.

＜29＞

A method for storing an internal olefin sulfonate, which comprises mixing an internal olefin sulfonate with at least one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides to obtain a composition having a content of the alkaline agent of 0.2 to 15mmol relative to 1mol of the internal olefin sulfonate.

＜30＞

The method for storing an internal olefin sulfonate of < 28 > or < 29 >, wherein the internal olefin sulfonate has preferably 10 or more, more preferably 12 or more, further preferably 14 or more, further preferably 16 or more, and further preferably 24 or less, more preferably 22 or less, further preferably 20 or less, further preferably 18 or less carbon atoms.

＜31＞

The method for preserving an internal olefin sulfonate according to any one of < 28 > to < 30 >, wherein when the internal olefin sulfonate is a mixture containing a hydroxyalkane sulfonate and an olefin sulfonate, the mass ratio (hydroxymer/olefin) of the content of the hydroxyalkane sulfonate to the content of the olefin sulfonate is preferably 40/60 to 95/5, more preferably 60/40 to 90/10, still more preferably 70/30 to 88/12, and still more preferably 75/25 to 86/14.

＜32＞

The method for storing an internal olefin sulfonate according to any one of < 28 > to < 31 >, wherein the internal olefin sulfonate contains an internal olefin sulfonate having a sulfonic acid group at a position of 2-position, preferably 6.8% by mass or more, more preferably 8.6% by mass or more, further preferably 11.3% by mass or more, further preferably 13.1% by mass or more, further preferably 24.9% by mass or less, more preferably 24.0% by mass or less, further preferably 23.1% by mass or less, further preferably 22.2% by mass or less, further preferably 21.3% by mass or less, further preferably 20.4% by mass or less, further preferably 19.5% by mass or less, further preferably 18.6% by mass or less.

＜33＞

The method for storing an internal olefin sulfonate according to any one of < 28 > to < 32 >, wherein the internal olefin sulfonate contains an olefin sulfonate having a double bond at a terminal of a carbon chain of preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.5% by mass or more, further preferably 1.0% by mass or more, further preferably 10% by mass or less, more preferably 5.3% by mass or less, further preferably 5.0% by mass or less, further preferably 4.7% by mass or less, further preferably 4.4% by mass or less, further preferably 4.1% by mass or less, further preferably 3.7% by mass or less, further preferably 3.4% by mass or less, and further preferably 3.1% by mass or less.

＜34＞

The method for preserving an internal olefin sulfonate according to any one of < 29 > to < 33 >, wherein the alkali agent is preferably an alkali metal hydroxide, more preferably sodium hydroxide or potassium hydroxide.

＜35＞

The method for preserving an internal olefin sulfonate according to any one of < 29 > to < 34 >, wherein the content of the one or more alkali agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 1.5mmol or more, more preferably 2.5mmol or more, further preferably 5mmol or more, and further preferably 9.8mmol or less, based on 1mol of the internal olefin sulfonate.

＜36＞

The method for preserving an internal olefin sulfonate according to any one of < 28 > to < 35 >, wherein the content of the internal olefin sulfonate in the composition is preferably 10% by mass or more, more preferably 18% by mass or more, further preferably 20% by mass or more, further preferably 25% by mass or more, further preferably 30% by mass or more, further preferably more than 30% by mass, further preferably 32% by mass or more, further preferably 36% by mass or more, further preferably 40% by mass or more, and further preferably 80% by mass or less, more preferably 70% by mass or less.

＜37＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 34 >, wherein,

preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 1.5mmol or more and 10mmol or less based on 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 10 mass% or more and 80 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 2.5mmol or more and 10mmol or less based on 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 20 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less based on 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 25 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 30 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition exceeds 30 mass% and is 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 32 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 36 mass% or more and 70 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, and the content of the internal olefin sulfonate in the composition is 40 mass% to 70 mass%.

＜38＞

The method for preserving an internal olefin sulfonate according to any one of < 29 > to < 37 >, wherein water is further mixed in the composition, and the content of water in the composition is preferably 17% by mass or more, more preferably 27% by mass or more, further preferably 89% by mass or less, more preferably 79% by mass or less, further preferably 74% by mass or less, further preferably 68% by mass or less, and further preferably 58% by mass or less.

＜39＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 35 >, wherein,

preferably: the composition contains 10 to 80 mass% of an internal olefin sulfonate, and water is further mixed in the composition, the content of water in the composition is 17 to 89 mass%,

more preferably: the composition contains 20 to 70 mass% of an internal olefin sulfonate and water, the composition contains 27 to 79 mass% of water,

more preferably: the composition contains 25 to 70 mass% of an internal olefin sulfonate, and water is further mixed in the composition, the content of water in the composition is 27 to 74 mass%,

more preferably: the composition contains 30 to 70 mass% of an internal olefin sulfonate, and water is further mixed in the composition, the water content in the composition is 27 to 68 mass%,

more preferably: the composition contains an internal olefin sulfonate in an amount of more than 30% by mass and not more than 70% by mass, and water is further mixed in the composition, the amount of water in the composition is not less than 27% by mass and not more than 58% by mass,

more preferably: the composition contains 32 to 70 mass% of an internal olefin sulfonate and water, the composition contains 27 to 58 mass% of water,

more preferably: the composition contains 36 to 70 mass% of an internal olefin sulfonate and water, the composition contains 27 to 58 mass% of water,

more preferably: the content of the internal olefin sulfonate in the composition is 40 to 70 mass%, and water is further mixed in the composition, and the content of the water in the composition is 27 to 58 mass%.

＜40＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 34 >, wherein,

preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 1.5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 10 mass% to 80 mass%, water is further mixed in the composition, the content of water in the composition is 17 mass% to 89 mass%,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 2.5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 20 mass% to 70 mass%, water is further mixed in the composition, the content of water in the composition is 27 mass% to 79 mass%,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 25 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 74 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 30 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 68 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition exceeds 30 mass% and is 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% to 58 mass%,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 32 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 36 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol to 10mmol relative to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 40 mass% to 70 mass%, water is further mixed in the composition, and the content of water in the composition is 27 mass% to 58 mass%.

＜41＞

The method for preserving an internal olefin sulfonate according to any one of < 29 > to < 40 >, wherein the composition has a pH value at 25 ℃ of preferably 8.5 or more, more preferably 9.0 or more, further preferably 9.4 or more, further preferably 9.8 or more, and further preferably 11.0 or less, and more preferably 10.5 or less, when the content of the internal olefin sulfonate is 10% by mass or more, or when the content of the internal olefin sulfonate is diluted with water to 10% by mass or more, and the diluted solution is diluted with water.

＜42＞

The method for preserving an internal olefin sulfonate as described in any one of < 28 > to < 41 >, wherein a buffer is further mixed in the above composition.

＜43＞

The method for preserving an internal olefin sulfonate according to < 42 >, wherein the buffering agent is preferably a carbonate salt, more preferably sodium carbonate.

＜44＞

The method for preserving an internal olefin sulfonate of < 42 > or < 43 >, wherein the content of the buffer in the composition is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, further preferably 0.1 parts by mass or more, and further preferably 3.0 parts by mass or less, more preferably 2.5 parts by mass or less, further preferably 2.0 parts by mass or less, further preferably 1.0 part by mass or less, and further preferably 0.5 parts by mass or less, based on 100 parts by mass of the internal olefin sulfonate.

＜45＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 34 >, wherein,

preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 1.5mmol or more and 10mmol or less per 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 10 mass% or more and 80 mass% or less, the composition is further mixed with a buffer, the content of the buffer is 0.01 parts by mass or more and 3.0 parts by mass or less per 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 2.5mmol or more and 10mmol or less per 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 20 mass% or more and 70 mass% or less, the composition is further mixed with a buffer, the content of the buffer is 0.05 parts by mass or more and 2.5 parts by mass or less per 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 25 mass% or more and 70 mass% or less, the composition is further mixed with a buffer, the content of the buffer is 0.1 parts by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 30 mass% or more and 70 mass% or less, a buffer is further mixed in the composition, the content of the buffer is 0.1 part by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition exceeds 30 mass% and is 70 mass% or less, the composition is further mixed with a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 32 mass% or more and 70 mass% or less, a buffer is further mixed in the composition, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 36 mass% or more and 70 mass% or less, the composition is further mixed with a buffer, the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of alkali metal hydroxides and alkaline earth metal hydroxides in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 40 mass% or more and 70 mass% or less, and the composition is further mixed with a buffer, and the content of the buffer is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate.

＜46＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 35 >, wherein,

preferably: the composition contains 10 to 80 mass% of an internal olefin sulfonate, water in the composition is 17 to 89 mass%, and a buffer is mixed in the composition, the content of the buffer in the composition is 0.01 to 3.0 parts by mass per 100 parts by mass of the internal olefin sulfonate,

more preferably: the composition contains 20 to 70 mass% of an internal olefin sulfonate, water in the composition, and a buffer in an amount of 0.05 to 2.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, the amount of the buffer in the composition being 27 to 79 mass% of the composition,

more preferably: the composition contains 25 to 70 mass% of an internal olefin sulfonate, water in the composition, and a buffer in an amount of 0.1 to 2.0 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the amount of the buffer in the composition is 27 to 74 mass% of the internal olefin sulfonate,

more preferably: the composition contains 30 to 70 mass% of an internal olefin sulfonate, water in the composition, and a buffer in an amount of 0.1 to 1.0 part by mass per 100 parts by mass of the internal olefin sulfonate, wherein the amount of the buffer in the composition is 27 to 68 mass% of the internal olefin sulfonate,

more preferably: the composition contains an internal olefin sulfonate in an amount of more than 30% by mass and not more than 70% by mass, water in an amount of 27% by mass or more and not more than 58% by mass, and a buffer in an amount of 0.1 part by mass or more and not more than 0.5 part by mass or less per 100 parts by mass of the internal olefin sulfonate,

more preferably: the composition contains an internal olefin sulfonate in an amount of 32 to 70 mass%, water in an amount of 27 to 58 mass%, and a buffer in an amount of 0.1 to 0.5 parts by mass based on 100 parts by mass of the internal olefin sulfonate,

more preferably: the composition contains 36 to 70 mass% of an internal olefin sulfonate, water in the composition, and a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate, wherein the amount of the buffer in the composition is 27 to 58 mass% of the internal olefin sulfonate,

more preferably: the composition contains an internal olefin sulfonate in an amount of 40 to 70 mass%, water in an amount of 27 to 58 mass%, and a buffer in an amount of 0.1 to 0.5 parts by mass per 100 parts by mass of the internal olefin sulfonate.

＜47＞

The method for preserving an internal olefin sulfonate as described in any one of < 29 > to < 34 >, wherein,

preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 1.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 10 mass% or more and 80 mass% or less, water is further mixed in the composition, the content of water in the composition is 17 mass% or more and 89 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.01 parts by mass or more and 3.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 2.5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 20 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 79 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.05 parts by mass or more and 2.5 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 25 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 74 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.1 part by mass or more and 2.0 parts by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 30 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 68 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.1 part by mass or more and 1.0 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition exceeds 30 mass% and is 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 32 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 36 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less, a buffer is further mixed in the composition, the content of the buffer in the composition is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate,

more preferably: the content of one or more alkaline agents selected from the group consisting of an alkali metal hydroxide and an alkaline earth metal hydroxide in the composition is preferably 5mmol or more and 10mmol or less with respect to 1mol of the internal olefin sulfonate, the content of the internal olefin sulfonate in the composition is 40 mass% or more and 70 mass% or less, water is further mixed in the composition, the content of water in the composition is 27 mass% or more and 58 mass% or less, a buffer is further mixed in the composition, and the content of the buffer in the composition is 0.1 part by mass or more and 0.5 part by mass or less with respect to 100 parts by mass of the internal olefin sulfonate.

＜48＞

The method for preserving an internal olefin sulfonate as described in any one of < 28 > to < 47 >, wherein an acid is further mixed in the above composition.

＜49＞

The method for preserving an internal olefin sulfonate according to < 48 >, wherein the acid is preferably citric acid, phosphoric acid or boric acid, more preferably citric acid.

＜50＞

The method for storing an internal olefin sulfonate of < 48 > or < 49 >, wherein the amount of the acid is preferably 10 parts by mass or less, more preferably 1 part by mass or less, further preferably 0.1 part by mass or less, and further preferably 0.01 part by mass or less, per 100 parts by mass of the internal olefin sulfonate.

＜51＞

The method for preserving an internal olefin sulfonate according to any one of < 28 > to < 50 >, wherein one or more surfactants selected from the group consisting of anionic surfactants and nonionic surfactants are further mixed in the composition.

＜52＞

The method for preserving an internal olefin sulfonate as described in any one of < 28 > to < 51 >, wherein a hydrotrope is further mixed in the above composition.

＜53＞

The method for preserving an internal olefin sulfonate according to any one of < 28 > to < 52 >, wherein a solvent is further mixed in the composition.

＜54＞

A hard surface cleaner, a household cleaner or a dish cleaner comprising the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜55＞

A hard surface cleaner, a household cleaner or a tableware cleaner, which is compounded with the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜56＞

The hard surface cleaner, the household cleaner or the tableware cleaner as described in < 54 > or < 55 > further comprises a surfactant other than the internal olefin sulfonate and at least one auxiliary selected from the group consisting of a perfume, an antiseptic, an antibacterial agent, a pH adjuster (e.g., citric acid) and a polyvalent cation.

＜57＞

The hard surface cleaner, the household cleaner, or the tableware cleaner as described in < 56 >, wherein the content of the surfactant (including the internal olefin sulfonate) in the hard surface cleaner, the household cleaner, or the tableware cleaner is preferably 0.5% by mass or more, more preferably 15% by mass or more, and further preferably 60% by mass or less, more preferably 30% by mass or less.

＜58＞

The hard surface cleaner, the household cleaner, or the tableware cleaner as described in < 56 > or < 57 >, wherein the content of the pH adjuster (e.g., citric acid) in the hard surface cleaner, the household cleaner, or the tableware cleaner is preferably 0.001% by mass or more, more preferably 8% by mass or less, and still more preferably 5% by mass or less.

＜59＞

A detergent for clothes comprising the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜60＞

A detergent for clothes, which is compounded with the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜61＞

Detergents for laundry use as described by < 59 > or < 60 > which also contain enzymes.

＜62＞

A treating agent for clothes comprising the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜63＞

A treating agent for clothes, which comprises the internal olefin sulfonate composition described in any one of < 1 > to < 27 >.

＜64＞

The treating agent for clothes described in < 62 > or < 63 > further comprising one or more auxiliary agents selected from hydrophilic solvents and antifoaming agents.

＜65＞

A softening agent for clothes comprising the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜66＞

A softening agent for clothes, which is compounded with the internal olefin sulfonate composition of any one of < 1 > to < 27 >.

＜67＞

A softening agent for clothing as described in < 65 > or < 66 > which further comprises a silicone.

＜68＞

A body cleanser comprising the internal olefin sulfonate composition according to any one of < 1 > to < 27 >.

＜69＞

A body cleanser comprising the internal olefin sulfonate composition according to any one of < 1 > to < 27 >.

＜70＞

A hair cleanser comprising the internal olefin sulfonate composition according to any one of < 1 > to < 27 >.

＜71＞

A hair cleansing composition comprising the internal olefin sulfonate composition according to any one of < 1 > to < 27 >.

＜72＞

Use of an internal olefin sulfonate composition according to any one of < 1 > to < 27 > in the manufacture of a hard surface cleaner, a household cleaner or a dishwashing cleaner.

＜73＞

Use of an internal olefin sulfonate composition according to any of < 1 > to < 27 > in the manufacture of a detergent for clothing.

＜74＞

Use of an internal olefin sulfonate composition according to any one of < 1 > to < 27 > in the manufacture of a treatment for laundry.

＜75＞

Use of an internal olefin sulfonate composition according to any one of < 1 > to < 27 > in the manufacture of a softener for laundry.

＜76＞

Use of the internal olefin sulfonate composition of any one of < 1 > to < 27 > in the manufacture of a cleanser for the body.

＜77＞

Use of an internal olefin sulfonate composition according to any one of < 1 > to < 27 > in the manufacture of a cleanser for hair.

＜78＞

The hard surface cleaner or tableware cleaner as described in any one of < 54 > to < 58 > is used for cleaning of plastics, glass, pottery, stainless steel, wood, sponge, chopping board, cooking table, table or chair, preferably for cleaning of hard surface where coloring or smell or the like is a problem, more preferably for cleaning of plastics, glass, pottery, sponge, chopping board, cooking table, table or chair.

＜79＞

Use of < 72 > for the manufacture of a hard surface cleaner or a cleaner for tableware, wherein the hard surface cleaner or the cleaner for tableware is used for cleaning of plastics, glass, crockery, stainless steel, wood, sponge, chopping board, cooking table, table or chair, preferably for cleaning of hard surfaces where staining or odor or the like is a problem, more preferably for cleaning of plastics, glass, crockery, sponge, chopping board, cooking table, table or chair.

＜80＞

The hard surface cleaner or the household cleaner as described in any one of < 54 > to < 58 > is used for cleaning of plastics, glass, pottery, stainless steel, wood, paper, leather, rubber, walls, floors, bathtubs, sinks, toilets or windows, preferably for cleaning of hard surfaces where coloring or odor or the like is a problem, more preferably for cleaning of plastics, glass, pottery, paper, walls, floors, bathtubs or toilets.

＜81＞

Use of < 72 > for the manufacture of a hard surface cleaner or a household cleaner for plastics, glass, ceramics, stainless steel, wood, paper, leather, rubber, walls, floors, bathtubs, sinks, toilets or windows, preferably for cleaning hard surfaces where staining or odor is an issue, more preferably for cleaning plastics, glass, ceramics, paper, walls, floors, bathtubs or toilets.