Procedure for the cathodic electrowinning of metals, with...

Details Procedure for the cathodic electrowinning of metals, with... Procedure for the cathodic electrowinning of metals, with...

C - Chemistry, Metallurgy

25

C

204/76.6

C25C 1/00 (2006.01) C25C 1/18 (2006.01) C25C 7/04 (2006.01)

Patent

CA 1275635

ABSTRACT OF THE DISCLOSURE Process for the cathodic electrowinning of metals, with the corresponding acid generation, from its salt solution, is disclosed. An electrochemical cell is used in which the anodic and cathodic compartments arc physically separated by a cation permoselective membrane. The cathodic compartment receives a solution of the metal salt, (typically, a chloride). The metal is discharged at the cathode, and the electrical equilibrium is maintained by protons passing from the anolyte, across the cation permeable membrane. In this way, acid is formed in the catholyte where the acid and the salt have the same anion. The anodic compartment contains anolyte, which is a solution of an inorganic oxygenated acid. The applied current discharges oxygen at the anode.

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