Method of recovering metals from industrial by-products

Details Method of recovering metals from industrial by-products Method of recovering metals from industrial by-products

1984-03-08

1986-02-25

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 42, 423 87, 423 92, 423 98, 423101, 423109, 423140, 423150, 75101R, 75108, 75117, 75118R, 75120, 75121, 204106, 204108, C01G 312, C01G 2800

Patent

active

045728224

ABSTRACT:
There is disclosed a novel method of recovering valuable metals from an industrial by-product containing copper and arsenic and at least one metal selected from among lead, zinc, iron, silver and cadmium, said method comprising leaching the by-product with sulfuric acid in an SO.sub.2 gas atmosphere at a temperature of 70.degree. C. or higher in the presence of a solid sulfide to thereby precipitate copper selectively as copper sulfide while dissolving other metal or metals in the leach solution and then separating the copper containing precipitate from the leach solution, said leach solution containing substantially no copper.

REFERENCES:
patent: 2805938 (1957-09-01), McGauley
patent: 3816105 (1974-06-01), McKay et al.
patent: 4049770 (1977-09-01), Swinkles et al.
patent: 4244734 (1981-01-01), Reynolds et al.
patent: 4290865 (1981-09-01), Baczek et al.

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