Electrolytically oxidizing organic materials and trivalent...

Details Electrolytically oxidizing organic materials and trivalent... Electrolytically oxidizing organic materials and trivalent...

C - Chemistry, Metallurgy

25

F

204/80

C25F 3/00 (2006.01) C23C 18/16 (2006.01)

Patent

CA 1079681

REGENERATION OF PLASTIC ETCHANTS ABSTRACT A method useful in the regeneration of a spent chromic acid-sulfuric acid plastic etch solution and also in the recovery of such etchant chemicals from rinse water associated with a plastic etching process, which method involves an electrolytic treatment, in which oxi- dation of trivalent chromium impurities to the service- able hexavalent state takes place simultaneously with expulsion of organic impurities from the solution. -i-

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