Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1978-03-06
1979-11-20
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
75119, C25C 108
Patent
active
041750144
ABSTRACT:
A method is provided for the recovery of cobalt from nickel solutions, wherein cobalt is separated from said solution as a precipitate containing cobaltic hydroxide precipitate and also containing nickel, the method comprising dissolving the precipitate for the subsequent recovery of cobalt therefrom by reducing trivalent metal in said precipitate to the divalent state. This is achieved by forming an aqueous slurry of said precipitate acidified with sulfuric acid to a pH ranging from about 0.1 to 2, subjecting the precipitate of said aqueous slurry to electrolytic reduction at the cathode of an electrolytic cell having an insoluble anode, said precipitate being isolated from said anode during said electrolytic reduction and continuing the electrolytic reduction of said precipitate from the trivalent to the divalent state and effect the dissolution thereof.
REFERENCES:
patent: 3673062 (1972-06-01), Smith et al.
patent: 3933976 (1976-01-01), Nikolic et al.
Crnojevich Ranko
Wiewiorowski Edward I.
Yu Peter H.
Amax Inc.
Andrews R. L.
Ciomek Michael A.
Kalil Eugene J.
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