Zinc electrowinning from chloride electrolyte

Details Zinc electrowinning from chloride electrolyte Zinc electrowinning from chloride electrolyte

C - Chemistry, Metallurgy

25

C

204/74

C25C 1/16 (2006.01)

Patent

CA 1160982

TITLE ZINC ELECTROWINNING FROM CHLORIDE ELECTROLYTE INVENTORS Donald J. MacKinnon John M. Brannen ABSTRACT OF THE DISCLOSURE Zinc has been electrowon from aqueous chloride solutions comprising zinc ions, chloride ions, hydrogen ions, and a soluble tetraalkylammonium chloride additive. Sparging close to the surface of the cathode and the presence of the selected additive have been found necessary to obtain smooth, compact, dendrite- free zinc deposits. Zinc in a desirable form is recovered readily from the cathode, and chlorine at the anode. The additive is preferably tetrabutylammonium chloride and part of it can be recycled.

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