阅读说明：本技术 一种长寿命天然气机油组合物 (Long-life natural gas engine oil composition ) 是由 李嘉 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种长寿命天然气机油组合物,包括以下重量百分含量的组分：基础油：75％～85％；复合剂：10.0％～15.0％；粘度指数改进剂5.0％～10.0％；降凝剂：0.2％～0.5％；抗泡剂：0.03％～0.05％。所述长寿命天然气机油组合物,换油里程长达6Wkm,粘度和碱保持能力优异,具有超凡的抗氧化、抗硝化和抗磨损性能,在康明斯发动机试验中表现优秀,对于发动机低速早燃问题有抑制作用,在给予发动机更好保护的同时还可以延长换油周期,降低用户总使用成本。(The invention discloses a long-life natural gas engine oil composition which comprises the following components in percentage by weight: base oil: 75 to 85 percent; compounding agent: 10.0% -15.0%; 5.0 to 10.0 percent of viscosity index improver; pour point depressant: 0.2 to 0.5 percent; and (3) anti-foaming agent: 0.03 to 0.05 percent. The long-life natural gas engine oil composition has the oil change mileage of 6Wkm, excellent viscosity and alkali retention capacity, extraordinary oxidation resistance, nitrification resistance and abrasion resistance, excellent performance in a Commins engine test, an inhibition effect on the low-speed pre-ignition problem of an engine, better protection for the engine, an extension of the oil change period and reduction of the total use cost of a user.)

1. The long-life natural gas engine oil composition is characterized by comprising the following components in percentage by weight:

base oil: 75 to 85 percent;

compounding agent: 10.0% -15.0%;

5.0 to 10.0 percent of viscosity index improver;

pour point depressant: 0.2 to 0.5 percent;

and (3) anti-foaming agent: 0.03 to 0.05 percent.

2. The long life natural gas oil composition of claim 1, wherein the base oil is a hydrogenated base oil and the anti-foaming agent is a non-silicone polymer.

3. The long life natural gas oil composition of claim 2, wherein the hydrogenated base oil is a group iii or group ii hydrogenated base oil.

4. The long life natural gas oil composition of claim 1, wherein the complexing agent is a mixture of a highly refined mineral oil, an alkyl phenol, an alkylaryl sulfonic acid, and a zinc alkyl dithiophosphate.

5. The long life natural gas oil composition of claim 4, wherein the deeply refined mineral oil comprises 30% to 35% of the complexing agent, the alkylphenol comprises 20% to 25% of the complexing agent, the alkylaryl sulfonic acid comprises 5% to 10% of the complexing agent, and the zinc alkyl dithiophosphate comprises 5% to 10% of the complexing agent.

6. The long life natural gas oil composition of claim 1, wherein the viscosity index improver is a hydrogenated styrene-diene copolymer that is a copolymer of styrene and isoprene or butadiene.

7. The long life natural gas oil composition according to claim 1, wherein the pour point depressant is an acrylate polymer solution, and the acrylate copolymer concentration in the acrylate polymer solution is 40% to 70%.

8. The long life natural gas oil composition as claimed in claim 1, wherein the long life natural gas oil composition comprises the following components in percentage by weight: 8.02kg of base oil, 1.15kg of complexing agent, 0.80kg of hydrogenated styrene-diene copolymer, 0.03kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

9. The long life natural gas oil composition as claimed in claim 1, wherein the long life natural gas oil composition comprises the following components in percentage by weight: 7.80kg of base oil, 1.45kg of complexing agent, 0.73kg of hydrogenated styrene-diene copolymer, 0.02kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

10. The long life natural gas oil composition as claimed in claim 1, wherein the long life natural gas oil composition comprises the following components in percentage by weight: 8.30kg of base oil, 1.00kg of complexing agent, 0.68kg of hydrogenated styrene-diene copolymer, 0.02kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

Technical Field

The invention belongs to the technical field of lubricating oil, and particularly relates to a long-life natural gas engine oil composition.

Background

With the stricter environmental regulations in the world, the development of the traditional energy is limited due to the large pollution to the environment, and the natural gas energy is more and more widely applied due to the excellent thermal performance, the environmental-friendly emission performance and the high-efficiency and rich reserves, so that the rapid development of the gas engine is promoted.

Compared with the common gasoline and diesel engine, the natural gas engine has the following characteristics: firstly, the temperature in the engine room is different, and the temperature in the natural gas engine room is higher than that of a gasoline and diesel engine, so that the lubricating oil is easy to lose efficacy; the natural gas exists in a gas state, and the gas cannot lubricate and cool the components unlike gasoline and diesel oil which exist in a liquid droplet state; and thirdly, combustion tail gas is different, and the content of oxynitride in the combustion tail gas of natural gas is far higher than that of the combustion tail gas of gasoline and diesel oil, so that oil products are easy to age and deteriorate. It follows that conventional gasoline engine oils and diesel engine oils have not been able to meet the lubrication requirements of natural gas engines.

In summary, the following problems exist in the prior art: the traditional gasoline and diesel engine oil does not have excellent oxidation resistance and nitrification resistance, can not effectively protect a spark plug and a valve seat from ablation and reduce the deposit of a combustion chamber, and does not have the protection performance of a tail gas three-way catalytic device.

Disclosure of Invention

The invention aims to solve the technical problems that the traditional gasoline and diesel engine oil does not have excellent oxidation resistance and nitrification resistance, can not effectively protect a spark plug and a valve seat from ablation and reduce the deposit of a combustion chamber, and does not have the protection performance of a tail gas three-way catalytic device.

In order to achieve the purpose, the invention adopts the technical scheme that:

the long-life natural gas engine oil composition comprises the following components in percentage by weight:

base oil: 75 to 85 percent;

compounding agent: 10.0% -15.0%;

5.0 to 10.0 percent of viscosity index improver;

pour point depressant: 0.2 to 0.5 percent;

and (3) anti-foaming agent: 0.03 to 0.05 percent.

Further, the base oil is hydrogenated base oil, and the anti-foaming agent is a non-organosilicon polymer.

Further, the hydrogenated base oil is group III and group II hydrogenated base oil.

Further, the complexing agent is a mixture of deep refined mineral oil, alkylphenol, alkylaryl sulfonic acid and zinc alkyl dithiophosphate.

Further, the deeply refined mineral oil accounts for 30-35% of the complexing agent, the alkylphenol accounts for 20-25% of the complexing agent, the alkylaryl sulfonic acid accounts for 5-10% of the complexing agent, and the zinc alkyl dithiophosphate accounts for 5-10% of the complexing agent.

Further, the viscosity index improver is a hydrogenated styrene-diene copolymer, and is a copolymer of styrene and isoprene or butadiene.

Further, the pour point depressant is an acrylate high polymer solution, and the concentration of the acrylate copolymer in the acrylate high polymer solution is 40-70%.

Further, the long-life natural gas engine oil composition comprises the following components in percentage by weight: 8.02kg of base oil, 1.15kg of complexing agent, 0.80kg of hydrogenated styrene-diene copolymer, 0.03kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

Further, the long-life natural gas engine oil composition comprises the following components in percentage by weight: 7.80kg of base oil, 1.45kg of complexing agent, 0.73kg of hydrogenated styrene-diene copolymer, 0.02kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

Further, the long-life natural gas engine oil composition comprises the following components in percentage by weight: 8.30kg of base oil, 1.00kg of complexing agent, 0.68kg of hydrogenated styrene-diene copolymer, 0.02kg of acrylic ester high polymer solution with the concentration of 40-70 percent and 3mL of antifoaming agent.

The natural gas engine oil composition or the long-life natural gas engine oil composition has the advantages that the oil change mileage is as long as 6Wkm (6 kilometers), the viscosity and alkali retention capacity is excellent, the superior oxidation resistance, nitrification resistance and abrasion resistance are realized, the spark plug and valve seat ablation can be effectively protected, the combustion chamber sediment is reduced, the tail gas three-way catalytic device protection performance is realized, the performance is excellent in the Commins engine test, the low-speed pre-ignition problem of the engine is inhibited, the oil change period can be prolonged while the engine is better protected, and the total use cost of a user is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a comparative graph illustrating a test of a first embodiment of a long life natural gas oil composition provided by an example of the present invention;

FIG. 2 is a comparative graph illustrating a second embodiment of a long life natural gas oil composition provided by an example of the present invention;

FIG. 3 is a comparative graph illustrating a long life natural gas oil composition according to a third embodiment of the present invention.

Detailed Description

The invention provides a long-life natural gas engine oil composition which comprises the following components in percentage by weight:

base oil: 75 to 85 percent;

compounding agent: 10.0% -15.0%;

5.0 to 10.0 percent of viscosity index improver;

pour point depressant: 0.2 to 0.5 percent;

and (3) anti-foaming agent: 0.03 to 0.05 percent.

In the present invention, the base oil accounts for 75% to 85%, preferably 77% to 82%, and more preferably 79% to 81% of the total weight of the long-life natural gas engine oil composition. Base oils according to the present invention refer to base stocks or base stock blends of lubricating oil compositions, which are produced by a single manufacturer to the same specifications (independent of feed source or manufacturer's location); meet the specifications of the same manufacturer; and is identified by the unique recipe, the product identification code, or both. In the present invention, the base oil may be one or a mixture of group iii and group ii hydrogenated base oils. The present invention is not particularly limited as to the source and type of base oil, and can be any presently known or later-discovered base oil used in formulating lubricating oil compositions for any and all such applications, such as engine oils, marine cylinder oils, functional fluids such as hydraulic oils, gear oils, transmission oils, and the like. The long life natural gas oil composition of the present invention can be prepared by one skilled in the art by conventional techniques using appropriate amounts of the disclosed base oils and conventional lubricating oil additives.

In the invention, the long-life natural gas engine oil composition contains 10.0-15.0% of complexing agent, preferably 11.0-13.0%, and more preferably 11.0-12.0% of complexing agent by total weight. In the invention, the complexing agent is a mixture of deeply refined mineral oil, alkylphenol, alkylaryl sulfonic acid and zinc alkyl dithiophosphate, wherein the deeply refined mineral oil accounts for 30-35% of the complexing agent, the alkylphenol accounts for 20-25% of the complexing agent, the alkylaryl sulfonic acid accounts for 5-10% of the complexing agent, and the zinc alkyl dithiophosphate accounts for 5-10% of the complexing agent. The complexing agent is used for improving the oxidation resistance, nitrification resistance and abrasion resistance of the lubricating oil; compared with the traditional gasoline and diesel oil complexing agent, the composition has the advantages of greatly improving the aspects of reducing the formation of piston sediments, protecting the abrasion of a gas valve system, inhibiting low-speed pre-ignition and resisting corrosion, and the superiority is verified in an engine bench test and a driving test.

In the present invention, the viscosity index improver is contained in an amount of 5.0% to 10.0%, preferably 7.0% to 9.0%, and more preferably 8.0% based on the total weight of the long-life natural gas engine oil composition. The viscosity index improver is used for improving the viscosity, viscosity index and viscosity-temperature performance of an oil product. The skilled person can select the addition within the above range depending on the specific kind of viscosity index improver. In the present invention, the source of the viscosity index improver is not particularly limited, and any commercially available product may be used. In a particular embodiment of the invention, the viscosity index improver is preferably a hydrogenated styrene-diene copolymer, which is a copolymer of styrene and isoprene or butadiene.

In the present invention, the long-life natural gas engine oil composition contains the pour point depressant in an amount of 0.2 to 0.5%, preferably 0.25 to 0.45%, and more preferably 0.3%, based on the total weight of the long-life natural gas engine oil composition. The pour point depressant changes the shape, size and number of wax crystals through eutectic or adsorption, inhibits the lubricating oil from forming a crystal network and keeps the oil flowing. Those skilled in the art can select the addition within the above range according to the specific kind of the pour point depressant. The pour point depressant of the present invention is not particularly limited in its source, and may be commercially available. In a specific embodiment of the present invention, the pour point depressant is preferably an acrylate polymer solution, wherein the acrylate copolymer concentration is 40% to 70%.

In the invention, the long-life natural gas engine oil composition contains 0.03-0.05% of antifoaming agent, preferably 0.035-0.045% of antifoaming agent. The antifoaming agent acts as a surfactant, and reduces the local surface tension of the lubricant, and is adsorbed on the surface of the bubbles or invades into the bubbles to cause the bubbles to collapse. The source of the antifoaming agent of the present invention is not particularly limited, and commercially available products are acceptable. In particular embodiments of the present invention, the preferred anti-foam agent is a non-silicone polymer.

The preparation method of the long-life natural gas engine oil composition provided by the invention is only required to be a conventional preparation method in the field. In the embodiment of the invention, the components described in the above scheme are preferably mixed to obtain a transparent and uniform mixture, namely the long-life natural gas engine oil composition of the invention.

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following raw materials are used in the following examples without specific indication, but are not intended to limit the scope of the present invention.

Base oil: modern 150N, GS 150N;

compounding agent:45500；

viscosity index improver: infinium SV 261;

pour point depressant: VISCOPLEX 1-254;

and (3) anti-foaming agent: 1# composite antifoam (acrylate non-silicon antifoam).

Example 1:

8.02kg of base oil, 1.15kg of complexing agent, 0.80kg of hydrogenated styrene-diene copolymer, 0.03kg of 40-70% acrylate high polymer solution and 3mL of 1# composite antifoaming agent are sequentially added into a stirring container to be stirred for 45 minutes, and the natural gas engine oil composition with long service life is obtained after sampling and observation and is completely transparent.

Example 2:

7.80kg of base oil, 1.45kg of complexing agent, 0.73kg of hydrogenated styrene-diene copolymer, 0.02kg of 40-70% acrylate high polymer solution and 3mL of 1# composite antifoaming agent are sequentially added into a stirring container to be stirred for 45 minutes, and the natural gas engine oil composition with long service life is obtained after sampling and observation and is completely transparent.

Example 3:

8.30kg of base oil, 1.00kg of complexing agent, 0.68kg of hydrogenated styrene-diene copolymer, 0.02kg of 40-70% acrylate high polymer solution and 3mL of 1# composite antifoaming agent are sequentially added into a stirring container to be stirred for 45 minutes, and the natural gas engine oil composition with long service life is obtained after sampling and observation and is completely transparent.

Wherein, the complexing agent contains 30 to 35 percent of deeply refined mineral oil, 20 to 25 percent of alkylphenol, 5 to 10 percent of alkylaryl sulfonic acid and 5 to 10 percent of alkyl dithiophosphate zinc.

Comparative example 1-1:

lubricating oil compositions 1-1 were prepared by substituting the compounding agent in the formulation of example 1 with another compounding agent and using the same components and proportions as in example 1.

Wherein, the other complexing agents contain 20 to 30 percent of olefine acid sulfide, 10 to 19.9 percent of sulfurized olefin, 5 to 9.9 percent of arylamine and 1 to 5 percent of calcium sulfonate.

The natural gas engine oil compositions prepared in the above examples 1, 2, 3 and comparative examples 1 to 1 were subjected to procedure ix low-speed pre-ignition test, high-temperature oxidation deposit test, nitration durability test, and the results were as follows:

as can be seen from Table 1, the natural gas engine oil composition of example 1 of the present invention exhibited good suppression of the problem of low-speed pre-ignition of the engine in the test of procedure IX, as compared with comparative examples 1-1.

As can be seen from fig. 1, the natural gas engine oil composition of example 1 according to the present invention showed significantly less deposition amount in the high temperature oxidation test than that of comparative example 1-1, and showed excellent oxidation resistance.

As can be seen from fig. 2 and 3, the natural gas engine oil composition of example 1 according to the present invention performed well in the nitrification test as compared with comparative example 1-1, the nitrate increment was significantly lower than that of comparative example 1-1, and the base number after nitrification was higher than that of comparative example 1-1, indicating that example 1 according to the present invention had superior anti-nitrification performance and base retention performance.

TABLE 1

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.