Title:
TREATMENT OF DETERIORATED ELECTROLESS-PLATING SOLUTION
Document Type and Number:
Japanese Patent JP3180977
Kind Code:
B2
Abstract:
PURPOSE: To treat a deteriorated electroless-plating soln. for making it harmless to the extent that the soln. can be discarded by efficiently separating and removing the dissolved components such as plating metal and a reducing agent from the soln.
CONSTITUTION: Powdery materials are dispersed in a dil. electroless-plating soln. regulated about to neutral to prepare a slurry, the slurry is heated and agitated, the same deteriorated soln. is added at a controlled flow velocity, and the plating powders are separated and removed in the first stage. The mother liquor thus obtained is allowed to react with a zinc compd., and the formed precipitate consisting essentially of zinc phosphite is separated and removed in the second stage.
Inventors:
Hiroshi Kawakami
Shozo Takatsu
Seikichi Tabei
Kingo Takeuchi
Shozo Takatsu
Seikichi Tabei
Kingo Takeuchi
Application Number:
JP25231392A
Publication Date:
July 03, 2001
Filing Date:
August 27, 1992
Export Citation:
Assignee:
Nippon Chemical Industry Co., Ltd.
International Classes:
C02F1/62; C23C18/31; (IPC1-7): C23C18/31; C02F1/62
Attorney, Agent or Firm:
Kenji Akatsuka (1 outside)