Nickel-cobalt separation

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Iron group metal

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Details

423144, 423145, 423150, C01G 5306, C01G 5100

Patent

active

039339750

ABSTRACT:
A method is provided for separating nickel and cobalt from a cobalt-nickel precipitate, the cobalt being in the cobaltic state. The method comprises dissolving the precipitate in an ammonium sulfate solution containing NH.sub.3, acidifying the solution to a pH of about 1.5 to 3.0 and then cooling the solution to produce a nickel-ammonium sulfate precipitate highly enriched in nickel. The precipitate is separated from the solution and the solution passed through an ion exchange column selective to the removal of nickel, the solution remaining containing said cobalt substantially free of nickel, the cobalt solution being then sent to cobalt recovery.

REFERENCES:
patent: 466495 (1892-01-01), Herrenschmidt
patent: 2647820 (1953-08-01), Forward
patent: 2767055 (1956-10-01), Schaufelberger
patent: 2845333 (1958-07-01), Schaufelberger
patent: 3003866 (1961-10-01), Mattano et al.
patent: 3728105 (1973-04-01), Skarko
patent: 3751558 (1973-08-01), Crnojevich et al.

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