Process and apparatus for the regeneration of chromic acid...

Details Process and apparatus for the regeneration of chromic acid... Process and apparatus for the regeneration of chromic acid...

C - Chemistry, Metallurgy

25

D

204/98.06

C25D 21/18 (2006.01) C25D 3/04 (2006.01) C25F 1/04 (2006.01) B29C 25/00 (1980.01)

Patent

CA 1141701

Abstract of the Disclosure A process and electrodialysis cell for regenerating used chromic acid baths for reuse. The process and apparatus have an anolyte chamber and a catholyte chamber separated by a cation permeable membrane and utilize as an improved catholyte solu- tion an aqueous mixture of a water soluble salt such as sodium sulfate. A preferred anode which is not decomposed by the chromic acid bath comprises by weight about 1.5% of silver, about 5% of antimony, about 3% of tin and the balance lead. - 0 -

347111

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