Hydrometallurgical recovery of copper, cobalt nickel with reduct

Details Hydrometallurgical recovery of copper, cobalt nickel with reduct Hydrometallurgical recovery of copper, cobalt nickel with reduct

1980-10-27

1982-03-30

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 33, 423150, 75101R, 75103, C22B 300

Patent

active

043223907

ABSTRACT:
Desired metal values are recovered from metal-bearing sources by subjecting said metal-bearing sources to a reduction step which is effected in an aqueous solution of an ammoniacal ammonium salt containing a reducing reagent such as hydrazine, hydroxylamine hydrochloride, etc., or by treatment with carbon monoxide in the presence of a metal chelate such as that formed from cobalt sulfate and dimethyl glyoxime, and thereafter subjecting the reduced source to an oxidative leach by treatment wth an oxygen-containing gas such as air or oxygen. The reducing step is effected at ambient temperatures and pressures and the oxidative step is effected at ambient temperatures and pressures ranging from about 5 to about 500 psig. Desired metal values such as nickel and cobalt may be recovered in commercially attractive yields.

REFERENCES:
patent: 3684491 (1972-08-01), Coffield
patent: 3728105 (1973-04-01), Skarbo
patent: 3888966 (1975-06-01), Miller
patent: 3891522 (1975-06-01), McKay
patent: 3967958 (1976-06-01), Coffield
patent: 4065542 (1977-12-01), Subramanian
patent: 4085188 (1978-04-01), Subramanian
patent: 4107262 (1978-08-01), Lueders
patent: 4243550 (1981-01-01), Burk
The Merck Index, 8th Ed., Merck & Co., Rahway, N.J., (1968), p. 1040.
Martell, Chemistry of the Metal Chelate Compounds, Prentice Hall (1952), pp. 385-387.

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