Title:
METHOD FOR TREATING CHEMICAL CLEANING WASTE LIQUID
Document Type and Number:
Japanese Patent JP2002346544
Kind Code:
A
Abstract:
To provide a treatment method which solves the problem that a chemical cleaning waste liquid discharged when an object is cleaned chemically at a high temperature contains an Fe-EDTA compound or a Cu-EDA compound, and since the compounds are very stable and high in concentration, it is difficult to detoxify the compounds.
The waste liquid containing the iron compound or the copper compound which is discharged after cleaning the object chemically at a high temperature is heated and dried to be solidified.
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Inventors:
OYA YASUMASA
SAGAWA HIROSHI
WAKUTA KUNIHARU
KAKIMOTO AKIRA
KAMIYOSHI HIDEKI
TABATA MASATAKA
SAGAWA HIROSHI
WAKUTA KUNIHARU
KAKIMOTO AKIRA
KAMIYOSHI HIDEKI
TABATA MASATAKA
Application Number:
JP2001153011A
Publication Date:
December 03, 2002
Filing Date:
May 22, 2001
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B01D1/22; C02F1/04; B09B3/00; (IPC1-7): C02F1/04; B01D1/22; B09B3/00
Attorney, Agent or Firm:
Soga Doteru (6 people outside)
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