Process for the recovery of cobalt from its impure, aqueous, in

Details Process for the recovery of cobalt from its impure, aqueous, in Process for the recovery of cobalt from its impure, aqueous, in

1978-07-07

1980-06-17

Konopka, P. E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423517, 423544, 423592, 75119, 252439, C01G 5110, C01G 5112, C22B 2304

Patent

active

042083800

ABSTRACT:
Cobalt is recovered as a finely-divided and anhydrous salt from impure, nickel-bearing, aqueous solutions of cobalt, by exposing the aqueous solution to oxidation at an elevated temperature in the presence of ammonia and the respective ammonium salt, the formation of cobalt (III) hexammine ions is catalysed with activated carbon or solid sulfides, a cobalt (III) hexammine salt is crystallized from the solution, the salt is separated from the solution and pyrolysed to form a cobalt (II) salt, and the released ammonia is returned to the oxidation stage.

REFERENCES:
patent: 2728636 (1955-12-01), Van Hare, Jr. et al.
patent: 2913335 (1959-11-01), Dean
patent: 3967957 (1976-07-01), Fonseca
patent: 4073860 (1978-02-01), Huggins et al.
Catalysis in Inorganic Hexammine Synthesis, by H. F. Schaefer, publ: University Microfilms, Michigan-1953.

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