Process for separating cobalt and nickel from a solution contain

Details Process for separating cobalt and nickel from a solution contain Process for separating cobalt and nickel from a solution contain

1979-06-28

1981-01-20

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C01G 5100

Patent

active

042462401

ABSTRACT:
An acid solution containing cobalt and nickel is contacted with an organic extraction medium comprising alkyl phosphonic acid mono alkyl ester where said alkyl group has 8-10 carbon atoms in two or more stages, wherein the contact at a first stage is carried out at a pH value not exceeding 5.0 and at a second and further stages being carried out at a pH range of 5.5-7.0. Thereby cobalt may effectively and selectively be extracted into the organic extraction medium from the solution without excess rise in viscosity. Cobalt and nickel may be separately recovered with high purity.

REFERENCES:
patent: 3399055 (1968-08-01), Ritcey
patent: 3402042 (1968-09-01), Lichty
patent: 3966569 (1976-06-01), Reinhardt
patent: 4088733 (1978-05-01), De Schepper
Chemical Abstracts, vol. 91, Nos. 77,365J and 24,689M, (1979).

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