Process to recover pure copper during purification of zinc sulfa

Details Process to recover pure copper during purification of zinc sulfa Process to recover pure copper during purification of zinc sulfa

1991-06-10

1993-04-06

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204108, 423 41, 423 98, 423106, 423109, 423111, 423140, 75326, 75738, C25C 112

Patent

active

052000427

ABSTRACT:
A process for recovery of copper from a copper residue obtained during purification of a zinc sulfate solution comprises leaching the copper residue in a concentrated sulfuric acid solution in the presence of an oxidant at a temperature of between 60.degree. and 80.degree. C. and separating the solids from the leach solution, electrowinning copper from the leach solution, returning the electrolyte solution to the initial leaching stage to initiate dissolution of the copper residue, and bleeding a portion of the electrolyte solution to reduce the concentration of impurities in the solution.

REFERENCES:
patent: 4093526 (1978-06-01), Blanco et al.

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