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

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

C - Chemistry, Metallurgy

01

G

252/83, 23/86

C01G 51/12 (2006.01) C01G 51/10 (2006.01) C22B 23/00 (2006.01)

Patent

CA 1120690

ABSTRACT OF THE DISCLOSURE 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 (111) hexammine ions is catalysed with activated carbon or solid sulfides, a cobalt (111) hexammine salt is crystallized fron the solution, the salt is separated from the solu- tion and pyrolysed to for a cobalt (11) salt, and the released ammonia is returned to tbe oxidation stage.

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