Method of treating electrolytic solution of copper for purificat

Details Method of treating electrolytic solution of copper for purificat Method of treating electrolytic solution of copper for purificat

1982-04-26

1983-09-13

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204130, 423 87, 423561R, C25R 112

Patent

active

044040717

ABSTRACT:
There is disclosed an improved method of treating a spent electrolyte of copper from a cell for electrolytic refining of copper for the purpose of purification and reuse of the spent electrolyte. The process comprises the steps of: pretreating the spent electrolyte for removing copper therefrom until the copper content is greatly reduced but still remains at a level which is substantially higher than the total content of various metal ion impurities, preferably to a concentration of 10-13 g/l of Cu; blowing a hydrogen sulfide gas into the pretreated solution at a temperature of 40.degree. C. or higher until the redox potential of solution becomes a certain predetermined value to precipitate metal ions; filtering the treated solution to separate the residue available as a raw material for copper smelting from a filtrate which consists essentially of sulfuric acid; and returning the filtrate to the cell for electrolytic refining of copper.

REFERENCES:
patent: 1148522 (1975-08-01), Martin et al.
patent: 3887448 (1975-06-01), Schulze
patent: 3919062 (1975-11-01), Lindquist, Jr.
"Common Operations", Applied Inorganic Analysis by Hillebrand et al., J. Wiley & Sons, 1962, pp. 58-59.
Encyclopedia of Chem. Reactions by C. A. Jacobson, vol. 1, 1946, Reinhold Publ. Co., 1946, pp. 330, 402, 414.
Gen. Chem., by H. H. Sisler et al., 1949, p. 545.

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