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Process-for-electrolytic-recovery-of-zinc-from-zinc-sulfate-solutions

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Process for electrolytic recovery of zinc from zinc sulfate solutions

Details

Inventors: Heimala, Seppo O.;
Assignee: Outokumpu Oy (Helsinki, FI)
Primary Examiner: Andrews; R. L.
Assistant Examiner:
Attorney, Agent or Firm: Brooks, Haidt, Haffner & Delahunty

A process for electrolytic recovery of zinc from zinc sulfate solutions according to the electrowinning principle, using an aluminum cathode and a zinc sulfate solution which is devoid of any organic substance and to which at least one of cobalt and nickel has been added in such an amount that the solution contains nickel less than 2 mg/l and cobalt less than 5 mg/l.

DETAILED DESCRIPTION According to the present invention current supply is increased by carrying out the electrolysis using a zinc sulfate solution which is devoid of any organic substance and to which cobalt, nickel or both has been added, but at such a rate that the solution contains nickel less than 2 mg/l and cobalt less than 5 mg/l.

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