CN115252863A - Deodorant for refuse landfill, preparation method and application thereof - Google Patents

Deodorant for refuse landfill, preparation method and application thereof Download PDF

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Publication number
CN115252863A
CN115252863A CN202210742739.4A CN202210742739A CN115252863A CN 115252863 A CN115252863 A CN 115252863A CN 202210742739 A CN202210742739 A CN 202210742739A CN 115252863 A CN115252863 A CN 115252863A
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deodorant
mixing
water
sodium
surfactant
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CN115252863B (en
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刘明
郑阳
申英杰
刘继东
陈俊杰
王森
陈润生
胡佳晨
王加华
王湘徽
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Shanghai Sus Environment Restoration Co ltd
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Shanghai Sus Environment Restoration Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/58—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
    • A61L2101/32—Organic compounds
    • A61L2101/34—Hydroxy compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
    • A61L2101/32—Organic compounds
    • A61L2101/36—Carboxylic acids or derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
    • A61L2101/32—Organic compounds
    • A61L2101/42—Organo-metallic compounds or complexes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/21—Use of chemical compounds for treating air or the like

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Epidemiology (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

The invention provides a deodorant for a refuse landfill, a preparation method and application thereof, wherein the deodorant comprises the following components in parts by weight: 0.8% -2.5% of citric acid, 0.5% -2.8% of metal chelating agent and 1.2% -3.5% of nitric acidSodium, 1.5-4.0% of linalool, 1.0-3.0% of surfactant, 1.5-3.2% of thickening agent, 1.0-3.5% of buffer solution and the balance of water. The deodorant provided by the embodiment of the invention can remove NH in a refuse landfill3、H2S and other gases; the deodorant has simple components, convenient preparation, low cost and stable effect; the deodorant can simultaneously exert effects by combining multiple deodorization principles, and has good deodorization effect.

Description

Deodorant for refuse landfill, preparation method and application thereof
Technical Field
The invention relates to the technical field of deodorizers, in particular to a deodorizer for a refuse landfill, a preparation method and application thereof.
Background
Based on historical reasons, china currently has a large number of irregular domestic garbage landfill sites. Since facilities such as site and side slope seepage prevention, leachate collection, landfill gas collection and the like are not arranged at the beginning of construction of the irregular domestic garbage landfill, the landfill causes serious pollution to the surrounding environment, and the odor of the landfill is a main problem. The main components of landfill odor comprise nitrogen-containing compounds, sulfides, halogens, derivatives, hydrocarbons, aromatic hydrocarbons, ketol-aldehyde phenol and other oxygen-containing organic matters, and the landfill odor has serious influence on human health. In recent years, the complaints of malodorous gas pollution in refuse landfills are increasing, and the complaints become environmental and social problems which need to be solved urgently. Among nitrogen-containing compounds and sulfides, ammonia (NH)3) And hydrogen sulfide (H)2S) is considered to be the main tributary of the foul odor of landfillsA donor. NH (NH)3Produced and released by ammonifying bacteria decomposing nitrogenous organic compounds; h2S is generated and released by reducing sulfate or decomposing sulfur-containing organic components by sulfate-reducing bacteria. Thus, landfill gas deodorization can be carried out by two different principles: removing or masking NH3And H2S, killing or inhibiting ammonifying bacteria and sulfate reducing bacteria.
The deodorant provided by the related art comprises zinc acetate solution, ethanol, zinc solution, citric acid, ethylenediamine tetraacetic acid ammonium, a dispersing agent and a synergist.
However, the deodorant has a poor deodorizing effect when it is used for deodorizing garbage in a garbage yard.
Disclosure of Invention
The invention aims to solve the technical problem of providing a deodorant for a refuse landfill, which can solve the problem that the existing deodorant has poor deodorizing effect when deodorizing refuse of the refuse landfill.
In order to solve the technical problems, the invention provides the following technical scheme:
in one aspect, the deodorant for the refuse landfill is provided, and comprises the following components in parts by weight:
0.8 to 2.5 percent of citric acid, 0.5 to 2.8 percent of metal chelating agent, 1.2 to 3.5 percent of sodium nitrate, 1.5 to 4.0 percent of linalool, 1.0 to 3.0 percent of surfactant, 1.5 to 3.2 percent of thickening agent, 1.0 to 3.5 percent of buffer solution and the balance of water.
In an optional embodiment, the metal chelating agent is any one of sodium tartrate, sodium gluconate and iron citrate chelate.
In an alternative embodiment, the surfactant is any one of stearic acid, sodium dodecylbenzene sulfonate and fatty glyceride.
In an alternative embodiment, the thickener is any one of carboxymethyl cellulose, propylene glycol alginate, and methyl cellulose.
In an alternative embodiment, the buffer is any one of sodium phosphate buffer, sodium citrate buffer, and tris.
In a further aspect, there is provided a method of preparing a deodorant for use in a landfill, the method being for preparing a deodorant as defined in any one of the preceding claims, the method comprising:
mixing citric acid, a metal chelating agent and sodium nitrate, and uniformly stirring to obtain a mixed solution;
mixing linalool and a surfactant, and uniformly stirring until emulsification to obtain an emulsion;
mixing the thickening agent with water, heating, and continuously stirring until the solid thickening agent is dissolved to obtain thickening liquid;
and mixing the mixed solution, the emulsion, the thickening solution and the buffer solution, adding the rest water after uniformly stirring, and continuously stirring to obtain the deodorant.
In an alternative embodiment, the ratio of linalool to surfactant is from 1.5 to 2.
In an alternative embodiment, the thickener is mixed with water and heated at a temperature of 70-80 ℃.
In an optional embodiment, the mixing time of the mixed solution, the emulsion, the thickening solution and the buffer solution after mixing with water is 2-3 hours.
On the other hand, the embodiment of the invention provides an application method of a deodorant for a refuse landfill, which is characterized in that the deodorant is diluted by 30-50 times (by mass) with water, atomized by automatic spraying equipment and sprayed on the surface or above the refuse pile body of the refuse landfill, so that malodorous gas is effectively removed.
The technical scheme of the invention has the following beneficial effects:
the deodorant citric acid provided by the embodiment of the invention can be mixed with NH3Carrying out acid-base neutralization reaction; the metal chelating agent may be reacted with H2The S reaction converts it to elemental sulfur. The addition of sodium nitrate can inhibit the growth and reproduction of ammonifying bacteria and sulfate reducing bacteria by changing the oxidation-reduction potential, and can stimulate the growth of nitrate reducing bacteria to form competitive advantages. Linalool as natural perfume has special fragrance and can maskLandfill odor. The deodorant provided by the embodiment of the invention can remove NH in a refuse landfill3、H2S and other gases; the deodorant has simple components, convenient preparation, low cost and stable effect; the deodorant can simultaneously exert effects by combining multiple deodorization principles, and has good deodorization effect.
Drawings
Fig. 1 is a schematic flow chart of a preparation method of a deodorant for a refuse landfill according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
In one aspect, the deodorant for the refuse landfill is provided, and comprises the following components in parts by weight:
0.8 to 2.5 percent of citric acid, 0.5 to 2.8 percent of metal chelating agent, 1.2 to 3.5 percent of sodium nitrate, 1.5 to 4.0 percent of linalool, 1.0 to 3.0 percent of surfactant, 1.5 to 3.2 percent of thickening agent, 1.0 to 3.5 percent of buffer solution and the balance of water.
The deodorant provided by the embodiment of the invention at least has the following beneficial effects:
the deodorant provided by the embodiment of the invention can be mixed with NH3Carrying out acid-base neutralization reaction; the metal chelating agent may react with H2The S reaction converts it to elemental sulfur. The addition of sodium nitrate can inhibit the growth and reproduction of ammonifying bacteria and sulfate reducing bacteria by changing the oxidation-reduction potential, and can stimulate the growth of nitrate reducing bacteria to form competitive advantages. Linalool as a natural perfume has special fragrance and can mask landfill odor. The deodorant provided by the embodiment of the invention can remove NH in a refuse landfill3、H2S and other gas deodorants; the deodorant has simple components, convenient preparation, low cost and stable effect; the deodorant can simultaneously play a role by combining various deodorization principles, and has good deodorization effect.
The deodorant provided by the embodiment of the present invention will be further explained and described by alternative embodiments.
Further, the mass fraction of citric acid may be 0.8%, 0.9%, 1.0%, 1.2%, 1.5%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.5%, etc. The mass fraction of the metal chelator may be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.2%, 1.5%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.5%, 2.6%, 2.7%, 2.8%, etc. The mass fraction of sodium nitrate may be 1.2%, 1.3%, 1.4%, 1.5%, 1.7%, 1.9%, 2.0%, 2.2%, 2.5%, 2.7%, 2.9%, 3.0%, 3.1%, 3.2%, 3.5%, etc. The mass fraction of linalool may be 1.5%, 1.7%, 1.9%, 2.0%, 2.2%, 2.5%, 2.7%, 2.9%, 3.0%, 3.1%, 3.2%, 3.5%, 4.1%, 4.2%, 4.3%, 4%, etc. The mass fraction of the surfactant may be 1.0%, 1.2%, 1.5%, 1.7%, 1.8%, 1.9%, 2.0%, 2.1%, 2.2%, 2.5%, 2.7%, 2.9%, 3.0%, etc. The mass fraction of the thickener may be 1.5%, 1.7%, 1.9%, 2.0%, 2.2%, 2.5%, 2.7%, 2.9%, 3.0%, 3.1%, 3.2%, etc. The mass fraction of the buffer may be 1.0%, 1.2%, 1.5%, 1.7%, 1.9%, 2.0%, 2.2%, 2.5%, 2.7%, 2.9%, 3.0%, 3.1%, 3.2%, 3.5%, etc.
In an alternative embodiment, the metal chelating agent is any one of sodium tartrate, sodium gluconate and iron citrate chelate.
Further, the metal chelating agent may be a mixture of sodium tartrate and sodium gluconate, and the mixing ratio may be 1.
In an alternative embodiment, the surfactant is any one of stearic acid, sodium dodecylbenzene sulfonate and fatty glyceride.
As an example, the surfactant may also be a mixture of stearic acid and fatty glyceride, and the mixing ratio may be 1.
In an alternative embodiment, the thickener is any one of carboxymethyl cellulose, propylene glycol alginate, and methyl cellulose.
As an example, the thickener may also be a mixture of carboxymethyl cellulose and methyl cellulose, and the mixing ratio may be 1.
In an alternative embodiment, the buffer is any one of sodium phosphate buffer, sodium citrate buffer, tris.
As an example, the buffer may also be a mixture of a sodium phosphate buffer and a sodium citrate buffer, and the mixing ratio may be 1.
On the other hand, the embodiment of the invention also provides a preparation method of the deodorant for the refuse landfill, please refer to fig. 1, and fig. 1 is a flow chart of the preparation method provided by the embodiment of the invention. The process for preparing a deodorant according to any one of the above, the process comprising:
s101, mixing citric acid, a metal chelating agent and sodium nitrate, and uniformly stirring to obtain a mixed solution;
s102, mixing linalool with a surfactant, and uniformly stirring until emulsification so as to obtain an emulsion;
s103, mixing the thickening agent with water, heating, and continuously stirring until the solid thickening agent is dissolved to obtain a thickening liquid;
and S104, mixing the mixed solution, the emulsion, the thickening solution and the buffer solution, adding the rest water after uniformly stirring, and continuously stirring to obtain the deodorant.
In an alternative embodiment, the ratio of linalool to surfactant is 1.5-2.
Exemplary ratios of linalool to surfactant are 1.5.
In an alternative embodiment, the thickener is mixed with water and heated to a temperature of 70-80 ℃. For example, the heating temperature may be 70 ℃, 71 ℃, 72 ℃, 73 ℃, 74 ℃, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃, 80 ℃ or the like.
In an alternative embodiment, the mixing solution, emulsion, thickener, buffer and water are mixed and then stirred for 2-3 hours. Illustratively, the stirring time may be 2 hours, 2.5 hours, 3 hours, or the like.
The deodorizer provided by the embodiments of the present invention is further explained and described below by specific examples.
Example 1
1) Composition of ingredients
2.0% of citric acid, 2.5% of citric acid chelated iron, 3.2% of sodium nitrate, 3.6% of linalool, 1.8% of sodium dodecyl benzene sulfonate, 2.4% of carboxymethyl cellulose, 3.0% of sodium phosphate buffer solution and 81.5% of water.
2) Preparation method
Mixing citric acid, citric acid chelated iron and sodium nitrate, and uniformly stirring to obtain a mixed solution; mixing linalool and sodium dodecyl benzene sulfonate, and uniformly stirring until emulsification so as to obtain an emulsion; mixing carboxymethyl cellulose with water, slowly heating to 75 ℃, and continuously stirring until the carboxymethyl cellulose is dissolved to obtain thickening liquid; and mixing the mixed solution, the emulsion, the thickening solution and the sodium phosphate buffer solution, adding the rest water after uniformly stirring, and continuously stirring for 2.5 hours to obtain the deodorant.
3) Application method
Diluting the deodorant by 40 times (by mass) with water, atomizing by automatic spraying equipment, and spraying to the surface of the landfill garbage pile body. The control group experiment was sprayed with the same amount of purified water. NH is detected by a portable multifunctional gas detector before and after spraying the medicament for 1 hour3、H2S, odor concentration.
4) Removal effect
Treatment of NH3Removal rate of H2Removal rate of S Odor concentration reduction rate
Example 1 98.0％ 91.5％ 94.8％
Pure water 46.1％ 20.6％ 28.3％
Example 2
1) Composition of ingredients
1.8% of citric acid, 2.2% of citric acid chelated iron, 3.0% of sodium nitrate, 3.2% of linalool, 1.6% of sodium dodecyl benzene sulfonate, 2.4% of propylene glycol alginate, 2.8% of tris (hydroxymethyl) aminomethane and 83.0% of water.
2) Preparation method
Mixing citric acid, citric acid chelated iron and sodium nitrate, and uniformly stirring to obtain a mixed solution; mixing linalool and sodium dodecyl benzene sulfonate, and uniformly stirring until emulsification to obtain an emulsion; mixing propylene glycol algae protein acid ester with water, slowly heating to 70 ℃, and continuously stirring until the propylene glycol algae protein acid ester is dissolved to obtain thickening liquid; and mixing the mixed solution, the emulsion, the thickening solution and the tris (hydroxymethyl) aminomethane, uniformly stirring, adding the rest water, and continuously stirring for 2 hours to obtain the deodorant.
3) Application method
Diluting the deodorant by 35 times (mass) with water, atomizing by automatic spraying equipment, and spraying to the surface of a landfill garbage pile body. The same amount of pure water was sprayed as a control experiment. NH is detected by a portable multifunctional gas detector before and after spraying the medicament for 1 hour3、H2S, odor concentration.
4) Removal effect
Treatment of NH3Removal rate H2S removal rate Odor concentration reduction rate
Example 2 97.2％ 89.4％ 91.5％
Pure water 45.0％ 25.7％ 30.8％
On the other hand, the deodorant for the refuse landfill is adopted to deodorize the refuse landfill, and the preparation method and the application thereof are provided.
The deodorant is diluted by 30-50 times (by mass) with water, atomized by automatic spraying equipment and sprayed onto the surface or above the landfill garbage stack body, so that malodorous gas is effectively removed.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A deodorant for a refuse landfill is characterized by comprising the following components in parts by weight:
0.8-2.5% of citric acid, 0.5-2.8% of metal chelating agent, 1.2-3.5% of sodium nitrate, 1.5-4.0% of linalool, 1.0-3.0% of surfactant, 1.5-3.2% of thickening agent, 1.0-3.5% of buffer solution and the balance of water.
2. The deodorant according to claim 1, wherein the metal chelating agent is any one of sodium tartrate, sodium gluconate, and iron citrate chelate.
3. A deodorant according to claim 1, wherein the surfactant is any one of stearic acid, sodium dodecylbenzenesulfonate and fatty acid glyceride.
4. The deodorant according to claim 1, wherein the thickener is any one of carboxymethyl cellulose, propylene glycol alginate, and methyl cellulose.
5. The deodorant according to claim 1, wherein the buffer is any one of a sodium phosphate buffer, a sodium citrate buffer, and tris (hydroxymethyl) aminomethane.
6. A method for preparing a deodorant for a landfill, the method being for preparing the deodorant according to any one of claims 1 to 5, the method comprising:
mixing citric acid, a metal chelating agent and sodium nitrate, and uniformly stirring to obtain a mixed solution;
mixing linalool and a surfactant, and uniformly stirring until emulsification to obtain an emulsion;
mixing the thickening agent with water, heating, and continuously stirring until the solid thickening agent is dissolved to obtain thickening liquid;
and mixing the mixed solution, the emulsion, the thickening solution and the buffer solution, adding the rest water after uniformly stirring, and continuously stirring to obtain the deodorant.
7. The method according to claim 6, wherein the ratio of linalool to the surfactant is 1.5-2.
8. The method according to claim 6, wherein the thickener is mixed with water and heated at a temperature of 70 to 80 ℃.
9. The method according to claim 6, wherein the mixing of the mixed solution, the emulsion, the thickener, the buffer solution and water is continued for 2 to 3 hours.
10. Use of a deodorant according to any one of claims 1-5 for deodorizing a landfill site.
CN202210742739.4A 2022-06-28 2022-06-28 Deodorant for landfill site, preparation method and application thereof Active CN115252863B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10216697A (en) * 1997-02-04 1998-08-18 Mitsubishi Gas Chem Co Inc Deodorant
JP2000005772A (en) * 1998-06-26 2000-01-11 Mitsubishi Gas Chem Co Inc Deodorizing agent
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