Title:
【発明の名称】重金属固定剤及びそれを用いた無害化処理方法
Document Type and Number:
Japanese Patent JP3065224
Kind Code:
B2
Abstract:
PURPOSE: To obtain the subject fixing agent suitable for inexpensively and readily carrying out treatment for detoxifying soil contaminated with a heavy metal or ash containing a heavy metal at a cold district without losing excellent chelating action, comprising an aqueous solution of lithium diethyldithiocarbamate. CONSTITUTION: This fixing agent comprises (A1 ) an aqueous solution of lithium diethyldithiocarbamate and the concentration of the component A1 , for example, is adjusted to be >=25wt.%, especially 30-65wt.%. The fixing agent, for example, contains <=30wt.% of a salt dialkyldithiocarbamate such as sodium or potassium diethyldithiocarbamate and may contain an alkali such as sodium hydroxide or potassium hydroxide or an acid such as hydrochloric acid or sulfuric acid so as to adjust the pH of the aqueous solution to 10 to 12.
More Like This:
Inventors:
Mikio Ide
Chitsugu Kitabatake
Chitsugu Kitabatake
Application Number:
JP1071095A
Publication Date:
July 17, 2000
Filing Date:
January 26, 1995
Export Citation:
Assignee:
Unitika Ltd.
International Classes:
A62D3/33; A62D3/36; B09B3/00; B09C1/02; B09C1/08; C09K3/00; A62D101/08; A62D101/43; (IPC1-7): C09K3/00; A62D3/00; B09B3/00; B09C1/02; B09C1/08
Domestic Patent References:
| JP63182390A |