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Title:
REMOVAL OF VOLATILE ORGANIC COMPOUND FROM SOIL
Document Type and Number:
Japanese Patent JP3438044
Kind Code:
B2
Abstract:

PURPOSE: To remove a volatile organic compound from soil contaminated therewith by mixing the soil with a combination of an acidic inorganic compound and a basic inorganic compound which can generate heat by the neutralization reaction between them.
CONSTITUTION: 'The volatile organic compound' as used herein means a hydrocarbon derivative having an atmospheric boiling point of 150°C or below i.e., a hydrocarbon or a compound derived by replacing at least one constituent hydrogen atom of the hydrocarbon by halogen, hydroxyl, amino or the like and is artificially contained in soil. It is exemplified by trichloroethylene. As the acidic inorganic compound, one (e.g. sulfuric acid) which has a pH of 3 or below when measured in a 1wt.% aqueous solution is desirable. As the basic inorganic compound, one (e.g. quick lime) having a pH of 10 or above when measured in a 1wt.% aqueous solution or suspension is desirable. When these compound are in the form of liquids or concentrated aqueous solutions at ordinary temperature, they are used after being diluted with water to concentrations of about 10-80wt.%. The water content of the soil to be treated is desirably 10-30wt.%. The temperature of the soil is desirably 15°C or above. The total amount of the inorganic compounds added is 0.1-150g/kg.


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Inventors:
Mamoru Matsumoto
Yoshinari Kawasaki
Takafumi Sakanashi
Application Number:
JP14193693A
Publication Date:
August 18, 2003
Filing Date:
June 14, 1993
Export Citation:
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Assignee:
Katayama Chemical Research Institute Co., Ltd.
International Classes:
B09C1/02; B09C1/06; B09C1/08; F24V30/00; C09K17/00; (IPC1-7): C09K17/00; A62D3/00; B09C1/02; B09C1/06; B09C1/08; F24J1/00
Domestic Patent References:
JP4347176A
JP4135689A
JP57145092A
JP63162592A
JP6191283A
JP576618A
JP5290469A
JP54130350A
JP5168727A
JP3178675A
Attorney, Agent or Firm:
Shintaro Nogawa



 
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