Title:
METHOD FOR RECOVERING ORGANIC QUATERNARY AMMONIUM HYDROXIDE OUT OF WASTE LIQUID
Document Type and Number:
Japanese Patent JP2688009
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for recovering efficiently and inexpensively organic quaternary ammonium hydroxide of high purity as a value out of waste liquid containing at least organic quaternary ammonium hydroxide.
CONSTITUTION: The method for recovering organic quaternary ammonium hydroxide out of waste liquid containing at least organic quaternary ammonium is provided. The method consists of the adsorption process for absorbing the organic quaternary ammonium ions in the waste liquid onto cation exchanger by bringing the waste liquid into contact with cation exchanger, the elution process for eluting the organic quaternary ammonium ions by bringing eluting liquid into contact with the cation exchanger to which the organic quaternary ammonium ions are absorbed, and the electrolytic process in which organic quaternary ammonium ion water solution is recovered by the electrolysis of the eluting liquid prepared in the elution process. Also at that time, anode liquid extracted out of the electrolytic process is circulated in the elution process and used as the eluting liquid.
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Inventors:
Shunpei Shimizu
Nagatoshi Ren
Shigeo Iri
Nagatoshi Ren
Shigeo Iri
Application Number:
JP33783592A
Publication Date:
December 08, 1997
Filing Date:
November 26, 1992
Export Citation:
Assignee:
Tama Chemical Industry Co., Ltd.
International Classes:
C25B3/00; H01L21/027; H01L21/30; H01L21/304; C02F1/42; (IPC1-7): C02F1/42; C25B3/00; H01L21/304
Attorney, Agent or Firm:
Katsuo Naruse (2 outside)