阅读说明：本技术 用于净化泄漏化学物质的中和吸附剂、其制备方法和填充有中和吸附剂的中和器 (Neutralizing adsorbent for purifying leaked chemical substances, method for producing the same, and neutralizer filled with the same ) 是由 姜练均 洪锡济 于 2021-03-29 设计创作，主要内容包括：本发明涉及一种用于净化泄漏化学物质的中和吸附剂、其制备方法和填充有中和吸附剂的中和器。根据本发明的用于净化泄漏化学物质的中和吸附剂包括40wt％至60wt％的通常可用于中和吸收酸性、碱性和/或有机化学物质的无机吸附剂、20wt％至30wt％的增稠剂、20wt％至30wt％的表面活性剂、以及变色指示剂,并且以固态配制。中和吸附剂,无论化学物质泄漏事故中泄漏的酸性、碱性和/或有机化学物质的类型、性质和特性如何,在迅速和安全地采取初始行动方面都是有效的,由此有助于防止二次事故。此外,当使用中和吸附剂时,无需担忧因酸碱反应产生的水而导致的污染扩散,可通过使用无毒化学品吸附剂使因净化剂而导致另外发生二次污染的担忧减至最小,并且无论泄漏化学物质的类型、性质和特性如何,都可以实时直观地查看到净化过程。此外,当使用填充有根据本发明的用于净化泄漏化学物质的中和吸附剂的中和器时,可以在初始行动过程中更安全有效地净化泄漏的化学物质。(The present invention relates to a neutralizing adsorbent for purifying leaked chemicals, a method for preparing the same, and a neutralizer filled with the neutralizing adsorbent. The neutralization sorbent for purifying leaked chemicals according to the present invention comprises 40 wt% to 60 wt% of an inorganic sorbent generally available for neutralizing and absorbing acidic, basic and/or organic chemicals, 20 wt% to 30 wt% of a thickener, 20 wt% to 30 wt% of a surfactant, and a color changing indicator, and is formulated in a solid state. The neutralizing adsorbent is effective in taking initial action quickly and safely regardless of the type, nature and characteristics of the acidic, basic and/or organic chemicals leaked in the chemical leakage accident, thereby helping to prevent a secondary accident. Further, when the neutralizing adsorbent is used, there is no concern about diffusion of pollution due to water generated by an acid-base reaction, the concern about additional occurrence of secondary pollution due to a purifying agent can be minimized by using a non-toxic chemical adsorbent, and the purifying process can be intuitively checked in real time regardless of the type, nature and characteristics of a leaking chemical. Further, when the neutralizer filled with the neutralizing adsorbent for purifying a leaking chemical according to the present invention is used, the leaking chemical can be purified more safely and efficiently during the initial action.)

1. A neutralizing sorbent for purifying a leaked chemical comprising:

100 parts by weight of a neutralizing adsorbent for purification, the neutralizing adsorbent comprising 40 to 60 wt% of an inorganic adsorbent generally available for neutralizing and absorbing at least one chemical selected from the group consisting of acidic, basic and organic chemicals, 20 to 30 wt% of a thickener and 20 to 30 wt% of a surfactant; and

0.01-0.02 parts by weight of a color changing indicator comprising methyl red or methyl orange, methylene blue and phenolphthalein,

wherein the inorganic adsorbent is at least one inorganic adsorbent selected from the group consisting of zeolite, alumina, perlite, and bentonite;

the neutralizing adsorbent is formulated in a solid state.

2. The neutralizing adsorbent according to claim 1, wherein said thickener is at least one selected from the group consisting of silica gel, silica powder, starch, natural cellulose and gelatin;

the surfactant is polyethylene glycol, propylene glycol, or a mixture of polyethylene glycol and propylene glycol;

the color changing indicator also includes a natural indicator.

3. The neutralizing sorbent according to claim 1, wherein a moisture content of the neutralizing sorbent for purifying leaked chemicals is 5 to 10 wt%.

4. The neutralizing sorbent according to claim 1, wherein the inorganic sorbent has an average particle size of 30 to 100 μ ι η, the neutralizing sorbent for purifying leaked chemicals being formulated in the form of a powder having an average particle size of 30 to 100 μ ι η, in the form of granules having an average particle size of 0.5 to 1.0mm, or in the form of pellets, grains, flakes or briquettes having an average particle size of 1.5 to 3.0 mm.

5. A method for preparing a neutralizing sorbent for purifying leaked chemicals comprising the steps of:

a) uniformly mixing 40-60 wt% of at least one inorganic adsorbent, 20-30 wt% of a thickener, and 20-30 wt% of a surfactant to prepare a neutralizing adsorbent for purification, wherein the at least one inorganic adsorbent is selected from the group consisting of zeolite having an average particle size of 30-100 μm, alumina, perlite, and bentonite, and is generally useful for neutralizing and absorbing at least one chemical selected from the group consisting of acidic, basic, and organic chemicals;

b) mixing 100 parts by weight of the neutralizing adsorbent for purification with 0.01 to 0.02 parts by weight of a color changing indicator, wherein the color changing indicator includes methyl red or methyl orange, methylene blue, and phenolphthalein;

c) drying to a moisture content of 5 wt% to 10 wt%; and

d) the neutralized adsorbent for purification comprising the color change indicator after drying is formulated in the form of powder having an average particle size of 30 to 100 μm, in the form of granules having an average particle size of 0.5 to 1.0mm, or in the form of pellets, granules, flakes, or small blocks having an average particle size of 1.5 to 3.0 mm.

6. A neutralizer for purifying a leaked chemical, which is filled with the neutralizing adsorbent for purifying a leaked chemical according to claim 1 and an inert gas or nitrogen gas and is in the form of a fire extinguisher or a pressure-storage type powder sprayer.

Technical Field

The present invention relates to a neutralizing adsorbent for purifying leaked chemicals, a method of preparing the same, and a neutralizer filled with the neutralizing adsorbent, and more particularly, to a neutralizing adsorbent for purifying leaked chemicals, a method of preparing the same, and a neutralizer filled with the neutralizing adsorbent, which help to prevent a secondary accident by rapidly, safely, and effectively neutralizing acidic, basic, and/or organic chemicals, such as hydrochloric acid, acetic acid, hydrofluoric acid, nitric acid, sulfuric acid, sodium hydroxide or potassium hydroxide solution, hydrogen peroxide, ammonia water, toluene, benzene, etc., which may be leaked in a chemical leakage accident that may occur unexpectedly in a laboratory or industrial site regardless of type and characteristics.

Background

In recent years, chemical leakage accidents in industrial sites, such as hydrofluoric acid leakage accidents in tortoise tails and qingzhou, hydrochloric acid leakage accidents in shangzhou, and the like, have caused a great deal of property and life loss. In addition, in a laboratory of a university or a research institute where a large amount of various types of chemicals are used, chemical leakage accidents often occur during the course of experiments.

When such chemical leakage accidents occur, the lack of initial action results in more serious secondary accidents, and thus rapid, proper initial action is particularly important to minimize property and life loss.

At present, in the case of a chemical leakage accident, it is common to manually install a fence or spray an adsorbent or a neutralizing agent as an initial countermeasure. In the hydrofluoric acid leakage accident of the turtle tail, a fireman sprays water onto the hydrofluoric acid, so that the accident is more serious.

As a conventional treatment for a chemical leakage accident, separate and strictly different methods have been used, such as neutralization with an alkaline chemical in the case of an acidic chemical leakage, neutralization with an acidic chemical in the case of an alkaline chemical leakage, and treatment with an adsorbent or an absorbent cloth in the case of an organic chemical leakage.

Additional accidents may result when the type and nature of the chemical that is leaked is unknown or the wrong neutralizing agent is used. Further, there is a concern that the neutralizing agent generally used for leakage of acidic chemicals causes secondary pollution due to residual basic chemicals when used in excess.

There have been concerns that: conventional neutralizing agents for acidic or basic use diffuse because when a neutralizing agent is used, the acid and base react to produce water, whereby the unreacted neutralizing agent is mixed with the water.

Further, since it is necessary to selectively use the neutralizing agent according to the type of the leaked chemical, the initial action is delayed, and since it is difficult for the person who takes the initial action to accurately determine the appropriate usage amount, the neutralization and the decontamination are not rapidly and appropriately performed, thereby making it highly likely to cause additional damage to property and life.

Therefore, the conventional art has limitations in that it is required to selectively use a neutralizing agent for acid or alkaline neutralization according to the type of leaked chemicals, and there is a clear limitation in the use thereof in the case of an organic chemical leakage accident.

In the case of a chemical leak, a typical conventional purge technique as an initial action is as follows.

Korean registered patent No. 10-1605582 (registration No. 3/16/2016) discloses a neutralization apparatus for neutralizing a leaked alkaline chemical, which includes a pressure storage type main body container containing a neutralizing agent for neutralizing the alkaline chemical; and a discharge unit including a rod for spraying the neutralizer, a discharge hose, and a safety pin installed on the main body container, wherein the pressure storage type main body container contains a surfactant and is at 7 to 9.8kgf/cm²The neutralizing agent is citric acid, fumaric acid, diluted hydrochloric acid, acetic acid or any mixture thereof.

Further, korean unexamined patent publication No. 10-1996-0010030 (published 2/14/1996) discloses an acid neutralizer composition which treats and removes a trace amount of leaked acid, toxic gas, etc., and is composed of an alkaline substance (triethanolamine) capable of smoothly reacting in a neutralization reaction, a gas absorbent (diethanolamine) which easily absorbs and neutralizes the leaked gas or the gas generated in the neutralization reaction, alizarin red, etc., which makes the reaction state visually recognizable.

Further, korean unexamined patent publication No. 10-1997-0009831 (published 3/27 1997) discloses a powdery acid neutralizer composition which treats and removes a trace amount of acid, toxic gas, etc., and is composed of an alkaline substance (anhydrous potassium carbonate, anhydrous sodium carbonate, magnesium oxide) capable of smoothly reacting in a neutralization reaction, a gas absorbent which easily absorbs and neutralizes a leaked gas or a gas generated in the neutralization reaction, BTB (pigment) which makes the reaction state visually recognizable, etc.

However, all of the above-described related arts can be limitedly applied to a specific type of acidic or basic chemicals, and cannot be applied to both acidic and basic chemicals. In addition, the above related art has a limitation in that organic chemicals cannot be purified.

In the following table 1, the above-described related art is summarized and compared according to types.

TABLE 1

Meanwhile, korean utility model registration No. 20-0272280 (registration of 3/4/2002) discloses an apparatus for spraying a neutralizing agent for chlorine and ammonia gas, and korean registered patent No. 10-1409521 (registration of 12/6/2014) discloses an apparatus for spraying a wet and dry neutralizing agent, but they have a problem in that chemicals to be treated are limited to only specific types. In addition, korean registered patent No. 10-2038255 (registration of 23/10/2019) discloses a vehicle-mounted disinfectant spraying system, and korean registered patent No. 10-1951724 (registration of 19/2/2019) discloses a vehicle-mounted device for spraying a neutralizing agent, but they relate to a technology of moving to an accident site using a vehicle and then treating, and are not portable types required for rapid initial action.

[ related art documents ]

[ patent document ]

(patent document 0001) Korean registered patent No. 10-1605582 (registration of 2016 at 3 months and 16 days)

(patent document 0002) Korean unexamined patent publication No. 10-1996 + 0010030 (published 2/14/1996)

(patent document 0003) Korean unexamined patent publication No. 10-1997-0009831 (published 3/27 in 1997)

Disclosure of Invention

It is a first object of the present invention to provide a neutralizing adsorbent for purifying leaked chemicals, which is effective in taking initial action quickly and safely regardless of the type, nature and characteristics of acidic, basic and/or organic chemicals leaked in a chemical leakage accident, thereby helping to prevent a more serious secondary accident.

A second object of the present invention is to provide a neutralizing adsorbent for purifying leaked chemicals, which does not require worry about diffusion of pollution due to water generated by an acid-base reaction and minimizes the worry of secondary pollution due to a purifying agent by using a non-toxic chemical adsorbent during use.

It is a third object of the present invention to provide a neutralizing sorbent for decontaminating leaking chemicals which allows the decontamination process to be visually observed in real time regardless of the type, nature and characteristics of the leaking chemicals.

It is a fourth object of the present invention to provide a method for efficiently preparing a neutralizing sorbent for the purification of leaked chemicals in accordance with all of the above objects.

A fifth object of the present invention is to provide a neutralizer filled with the neutralizing adsorbent for purifying leaked chemical according to the first to third objects, which realizes purification by being effectively applied to a pollution source.

The first to third objects of the present invention can be favorably achieved by a neutralization adsorbent for purifying a leaking chemical, comprising: 100 parts by weight of a neutralizing adsorbent for purification comprising 40 to 60% by weight of an inorganic adsorbent generally available for neutralizing and adsorbing at least one chemical selected from the group consisting of acidic, basic and organic chemicals; 20 to 30 wt% of a thickener; and 20 to 30 wt% of a surfactant; and 0.01 to 0.02 parts by weight of a color change indicator comprising methyl red or methyl orange, methylene blue and phenolphthalein, wherein the inorganic adsorbent is at least one inorganic adsorbent selected from the group consisting of zeolite, alumina, perlite and bentonite, and the neutralizing adsorbent is formulated in a solid state.

The fourth object of the present invention can be favorably achieved by a method for preparing a neutralizing adsorbent for purifying a leaking chemical, comprising the steps of: a) uniformly mixing 40-60 wt% of at least one inorganic adsorbent, 20-30 wt% of a thickener, and 20-30 wt% of a surfactant to prepare a neutralizing adsorbent for purification, wherein the at least one inorganic adsorbent is selected from the group consisting of zeolite having an average particle size of 30-100 μm, alumina, perlite, and bentonite, and is generally useful for neutralizing and absorbing at least one chemical selected from the group consisting of acidic, basic, and organic chemicals; b) mixing 100 parts by weight of a neutralization adsorbent for purification with 0.01-0.02 part by weight of a color-changing indicator, wherein the color-changing indicator comprises methyl red or methyl orange, methylene blue and phenolphthalein; c) drying to a moisture content of 5 wt% to 10 wt%; d) the dried neutralized adsorbent for purification containing the color-changing indicator is formulated in the form of powder having an average particle size of 30 to 100 μm, in the form of granules having an average particle size of 0.5 to 1.0mm, or in the form of pellets, granules, flakes or small blocks having an average particle size of 1.5 to 3.0 mm.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:

FIG. 1 shows a schematic flow diagram of a method for preparing a neutralizing sorbent for decontaminating leaked chemicals according to the present invention;

FIG. 2 shows a schematic of the formulation of a neutralizing sorbent for the purification of leaked chemicals according to the present invention;

FIG. 3 shows a schematic view of a neutralizer in the form of a fire extinguisher filled with a neutralizing sorbent for purifying leaked chemicals in accordance with the present invention;

fig. 4 shows a schematic view of a neutralizer according to the invention in the form of a pressure storage duster filled with neutralizing sorbent for cleaning of leaked chemicals.

Detailed Description

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

It should be understood that the following description describes the present invention by way of specific embodiments, and the technical spirit of the present invention is not limited to the following description. Further, the drawings are provided to facilitate understanding of the present invention, and the technical spirit of the present invention is not limited to the drawings.

Formulation of neutralizing adsorbents for purifying leaked chemicals

The neutralizing adsorbents for purifying the leaking chemicals according to the present invention include inorganic adsorbents, thickeners, surfactants, and color changing indicators generally useful for neutralizing and absorbing acidic, basic, and organic chemicals or any mixture thereof, and are formulated in a solid state.

The neutralizing adsorbent for purifying leaked chemicals according to the present invention can be widely used in various applications such as adsorption treatment of leaked chemicals, solidification treatment of chemical wastes, and the like in a leakage accident that may occur in a laboratory, an industrial site, and the like.

The neutralizing adsorbent for purifying leaked chemicals according to the present invention can be prepared by mixing food additives, cosmetic raw materials, and raw materials generally used for preparing chemicals. The inorganic adsorbent may be zeolite, alumina, perlite, bentonite or any mixture thereof, but the present invention is not limited thereto.

The content of the inorganic adsorbent is 40 to 60 wt% with respect to the total weight of the neutralization adsorbent for purifying a chemical leaked according to the present invention. For example, when one type of inorganic adsorbent is used, the one type of inorganic adsorbent may be contained in an amount of 40 wt% to 60 wt% with respect to the total weight of the neutralizing adsorbent for purifying the leaking chemical. When at least two types of inorganic adsorbents are used, the total content of the at least two types of inorganic adsorbents may range from 40 wt% to 60 wt% with respect to the total weight of the neutralizing adsorbent for purifying the leaking chemical.

When the content of the inorganic adsorbent is less than 40 wt%, it may be difficult to achieve the desired performance of the neutralizing adsorbent for purification according to the present invention. On the other hand, when the content of the inorganic adsorbent exceeds 60 wt%, the activities of the thickener and the surfactant may be reduced, or adsorption and gelation may not be well performed, thereby reducing the adsorption rate.

In addition, the thickener may be silica gel, silica powder, starch, natural cellulose, Hycel, gelatin, or any mixture thereof, but the present invention is not limited thereto.

The content of the thickener is 20 to 30 wt% with respect to the total weight of the neutralization adsorbent for purifying the leaking chemical. For example, when one type of thickener is used, the one type of thickener may be contained in an amount of 20 wt% to 30 wt% with respect to the total weight of the neutralizing adsorbent for purifying the leaking chemical. When at least two types of thickeners are used, the total content of the at least two types of thickeners may range from 20 wt% to 30 wt% with respect to the total weight of the neutralizing absorbent for purifying the leaking chemical. When the content of the thickener is less than 20 wt%, it may be difficult to achieve the desired performance of the neutralization adsorbent for purifying leaked chemicals according to the present invention. On the other hand, when the content of the thickener exceeds 30 wt%, the activities of the inorganic adsorbent material and the surfactant may be reduced, or the thickener may block the pores of the inorganic adsorbent material, thereby reducing the adsorption rate.

Further, the surfactant may be polypropylene glycol, polyethylene glycol, or a mixture thereof, but the present invention is not limited thereto.

The content of the surfactant is 20 wt% to 30 wt% with respect to the total weight of the neutralization adsorbent for purifying the leaked chemical. For example, when one type of surfactant is used, the one type of surfactant may be contained in an amount of 20 wt% to 30 wt% with respect to the total weight of the neutralization adsorbent for purifying the leaked chemical. When at least two types of surfactants are used, the total content of the at least two types of surfactants may range from 20 wt% to 30 wt% with respect to the total weight of the neutralizing adsorbent for purifying the leaking chemical. When the content of the surfactant is less than 20 wt%, it may be difficult to achieve the desired performance of the neutralizing adsorbent for purification according to the present invention. On the other hand, when the content of the surfactant exceeds 30 wt%, the activities of the inorganic adsorbent material and the thickener may be reduced, or the surfactant may interfere with the action of the thickener, thereby reducing the adsorption rate.

Meanwhile, the color change indicator may be methyl red, methyl orange, methylene blue, phenolphthalein, a natural indicator (red cabbage, eggplant, rose, etc.), or any mixture thereof, but the present invention is not limited thereto.

In this case, methyl red is red (pH4.4)Yellow (pH6.2) indicator, methyl orange is red (pH3.1)Yellow (pH4.4) indicator, phenolphthalein being red (pH0)Colorless and colorlessPurple (pH8.2)A colorless (pH12) indicator, methylene blue being a dark blue in oxidizing environments and a light blue in reducing environments redox indicator.

In the neutralizing adsorbent for purifying a leaking chemical according to the present invention, preferably, phenolphthalein for neutralizing absorption and purification of an acidic chemical, methyl orange or methyl red for neutralizing absorption and purification of a basic chemical, and a redox indicator for neutralizing absorption and purification of an organic chemical, methylene blue are included. More preferably, all phenolphthalein, methyl orange or methyl red, and methylene blue are included, and in particular, equal amounts of these indicators may be contained.

The content of the color-changing indicator may be 0.01 to 0.02 parts by weight with respect to 100 parts by weight of the neutralizing absorbent for purifying the leaking chemical. When the content of the color change indicator is outside the above range, the sensitivity to color change desired in the present invention may be reduced.

Further, alternatively, the content of the deodorizing agent may be 0.1 to 3.0 parts by weight with respect to 100 parts by weight of the neutralizing adsorbent for purifying a chemical leaked according to the present invention. Examples of deodorants include particulate porous materials, for example, red shale powder and silicate mineral powder.

The inclusion of a ceramic deodorizing agent can help remove the offensive odor generated during the purification process.

Method for preparing neutralizing adsorbent for purifying leaked chemical substances

Next, a method for preparing a neutralizing adsorbent for purifying leaked chemical substances according to the present invention will be described.

Fig. 1 shows a schematic flow diagram of a method according to the invention for producing a neutralizing sorbent for purifying a leaking chemical, comprising the following steps: a) mixing an inorganic adsorbent, a thickener, and a surfactant to prepare a neutralizing adsorbent for purification; optionally, b) mixing a neutralizing sorbent for decontamination with a color changing indicator; c) drying the neutralized adsorbent for purification, which has been mixed with the indicator, to a moisture content ranging from 5 wt% to 10 wt%; and optionally, d) formulating the dried neutralized sorbent for purification with the desired particle size and form.

The neutralized adsorbent may be formulated into a pellet or a briquette form using a compression molding machine, a powder form using a ball mill or the like, or a fine particle or flake form using a particle molding machine or a flake molding machine.

In this case, the components and composition ratios used in the method for preparing a neutralizing adsorbent for purifying a leaking chemical according to the present invention are the same as the formulation of the above-described neutralizing adsorbent for purifying a leaking chemical.

That is, a mixture including 40 to 60 wt% of an inorganic adsorbent, 20 to 30 wt% of a thickener, and 20 to 30 wt% of a surfactant is formulated, and the content of the color-changing indicator is 0.01 to 0.02 parts by weight with respect to 100 parts by weight of the mixture.

An example of the form of the neutralizing adsorbent for purifying leaked chemical substances according to the present invention prepared by the method for preparing a neutralizing adsorbent for purifying leaked chemical substances according to the present invention may refer to an enlarged view shown in fig. 2, but this is only an example and does not limit the form of the neutralizing adsorbent for purifying leaked chemical substances according to the present invention.

Neutralizer filled with neutralizing adsorbent for purifying leaked chemical substances

When an acid, basic or organic chemical, or any mixture thereof, is accidentally leaked, the neutralizing sorbent for decontaminating leaked chemicals according to the present invention can be directly dosed or sprayed onto the leaked chemicals by the person taking the initial action. However, in view of convenience and safety of use, it is preferable that the neutralizing adsorbent is sprayed at least 5m from the leaked chemical using a neutralizer filled with the neutralizing adsorbent for purifying the leaked chemical according to the present invention in the form of a portable pressure storage type fire extinguisher or pressure storage type powder sprayer.

The neutralizer filled with the neutralizing adsorbent for purifying the leaked chemical according to the present invention, for example, the fire extinguisher, may be filled with a pressure of 7 to 9.8kgf/cm²Nitrogen or an inert gas. Furthermore, the neutralizer, for example a pressure-accumulating duster, may be filled with nitrogen or an inert gas at a working pressure of up to 3 bar.

Fig. 3 and 4 show schematic views of a fire extinguisher and a pressure storage type powder sprayer, respectively, filled with a neutralizing adsorbent for purifying leaked chemicals according to the present invention. Since their basic structures are known, additional description thereof will be omitted.

Figure 3 shows a fire extinguisher filled with a neutralising sorbent for the detoxification of chemical leaks according to the invention. Reference numeral 10 denotes a neutralizing adsorbent for purifying leaked chemicals according to the present invention, reference numeral 20 denotes a main body, reference numeral 30 denotes a discharge unit, reference numeral 31 denotes a safety pin, reference numeral 32 denotes a control lever, and reference numeral 33 denotes a discharge hose. Fig. 4 shows a pressure-storage type powder sprayer filled with a neutralizing adsorbent for chemical detoxification according to the present invention. Reference numeral 50 denotes a neutralizing adsorbent for purifying leaked chemicals according to the present invention, reference numeral 40 denotes a main body, reference numeral 60 denotes a safety valve, reference numeral 70 denotes a piston pump, reference numeral 80 denotes a discharge unit, and reference numeral 81 denotes a discharge hose. These are examples of neutralizing agents in the form of fire extinguishers filled with neutralizing adsorbents according to the present invention for the removal of leaked chemical toxicity and in the form of pressure-stored dusters, respectively. Since their basic structures are known, additional description thereof will be omitted.

Meanwhile, when compared with the related art shown in table 1, the neutralizer in the form of a fire extinguisher or pressure storage type powder sprayer filled with the neutralizing adsorbent for purifying leaked chemical substances according to the present invention has the following advantages: less fear of fatal accidents by spraying the neutralizing adsorbent at a distance of at least 5m from the accident site, high convenience of use, rapid initial action taking, immediate use in emergency without selection based on the difference of acidic, basic and organic chemicals, suppression of evaporation of toxic gases and liquids by inclusion of a surfactant, and no fear of secondary pollution since the neutralizing agent (chemisorbent) is a solid non-toxic substance.

Example 1: preparation of neutralizing adsorbents for purification of leaking chemicals

50 wt% of zeolite as an inorganic adsorbent, 20 wt% of silicon powder as a thickener, and 30 wt% of polyethylene glycol as a surfactant were uniformly mixed for one hour using a ribbon blender as a powder blender with respect to the total weight of a neutralizing adsorbent for purifying a leaking chemical, and then the mixture was mixed with an indicator for 5 minutes, wherein the indicator includes phenolphthalein, methyl orange, and methylene blue in an amount of 0.01 parts by weight with respect to 100 parts by weight of the mixture.

The thus prepared chemical neutralization adsorbent was collected in a collection part at the bottom of the mixer and dried so that the moisture content became 7 wt%, thereby preparing a neutralization adsorbent for purifying the leaked chemical.

Example 2: preparation of neutralizing adsorbents for purification of leaking chemicals

Bentonite of 60 wt% as an inorganic adsorbent, silica gel of 20 wt% as a thickener, and polypropylene glycol of 20 wt% as a surfactant were uniformly mixed for one hour using a ribbon blender as a powder blender with respect to the total weight of a neutralizing adsorbent for purifying a leaking chemical, and then the mixture was mixed with an indicator for 5 minutes, wherein the indicator includes phenolphthalein, methyl orange, and methylene blue in an amount of 0.02 parts by weight with respect to 100 parts by weight of the mixture.

The thus prepared chemical neutralization adsorbent was collected in a collection part at the bottom of the mixer and dried so that the moisture content became 7 wt%, thereby preparing a neutralization adsorbent for purifying the leaked chemical.

Comparative example 1: preparation of neutralizing adsorbents for purification of leaking chemicals

A neutralizing adsorbent for purifying a leaking chemical was prepared in the same manner and procedure as in example 1, except that 80 wt% of zeolite as an inorganic adsorbent, 10 wt% of silica fume as a thickener, and 10 wt% of polyethylene glycol as a surfactant were used, relative to the total weight of the neutralizing adsorbent for purifying a leaking chemical.

Comparative example 2: preparation of neutralizing adsorbents for purification of leaking chemicals

A neutralizing adsorbent for purifying a leaking chemical was prepared in the same manner and procedure as in example 2, except that 50 wt% of bentonite as an inorganic adsorbent, 10 wt% of silica gel as a thickener, and 40 wt% of polypropylene glycol as a surfactant were used, relative to the total weight of the neutralizing adsorbent for purifying a leaking chemical.

Test example: measurement of adsorption rates relative to acidic, basic and organic chemicals

The adsorption rates of the neutralizing adsorbents for purifying the leaking chemicals prepared in examples 1 and 2 and comparative examples 1 and 2 were measured for acidic, basic and organic chemicals per unit gram. As reagents, concentrated hydrochloric acid (HCl, 35.4%), aqueous sodium hydroxide solution (prepared by dissolving 20g of NaOH reagent in 100ml of water) and benzene (99.5%) were used.

The results are shown in table 2 below.

[ Table 2]

According to the results shown in table 2, examples 1 and 2 showed a chemical adsorption rate about 2 times higher than that of comparative examples 1 and 2.

It can be seen that when an excessive amount of the inorganic adsorbent is used as in comparative example 1, the effect of the thickener is reduced, thereby delaying gelation and reducing the adsorption rate, and when an excessive amount of the surfactant is used as in comparative example 2, the adsorption rate is reduced as compared to example 2.

The neutralizing adsorbent for purifying leaked chemicals according to the present invention is effective in taking initial action rapidly and safely regardless of the type, nature and characteristics of leaked acidic, basic and/or organic chemicals in a chemical leakage accident, thereby helping to prevent a secondary accident. Further, when the neutralizing adsorbent is used, there is no concern about diffusion of pollution due to water generated by an acid-base reaction, the concern about additional occurrence of secondary pollution due to a purifying agent can be minimized by using a non-toxic chemical adsorbent, and the purifying process can be intuitively checked in real time regardless of the type, nature and characteristics of a leaking chemical.

Further, when the neutralizer filled with the neutralizing adsorbent for purifying a leaking chemical according to the present invention is used, the leaking chemical can be purified more safely and efficiently during the initial action.

Although the present invention has been described through exemplary embodiments, it will be understood by those of ordinary skill in the art that various modifications and applications not shown above are possible without departing from the essential characteristics of the present invention. Accordingly, the present embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

INDUSTRIAL APPLICABILITY

The neutralization sorbent for the removal of the toxicity of leaked chemicals according to the present invention provides an immediate first responder in the case of leakage of acid, alkali and/or organic chemicals quickly and safely regardless of the type, nature and characteristics of the leaked chemicals. The method is favorable for preventing secondary accidents, has no risk of pollution diffusion, and can visually check the purification process in real time.