Nickel and cobalt solvent extraction with mercaptides

Details Nickel and cobalt solvent extraction with mercaptides Nickel and cobalt solvent extraction with mercaptides

1977-09-08

1979-04-10

Hearn, Brian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260583EE, 423139, 423149, 423418, 75101BE, C07F 1504, C07F 1506

Patent

active

041488130

ABSTRACT:
A novel class of extractants and a method of using the extractants in the hydrometallurgical recovery of nickel and cobalt metal. The extractants comprise a water immiscible organic solvent system containing solubilized mercaptide anions. In an important embodiment of the invention, the mercaptide ions are generated by adding a mercaptan to a mixed water immiscible solvent comprising a basic compound such as an amine, preferably a tertiary amine, and a polar component such as an alcohol, whereby the mercaptan undergoes acid dissociation.
The extractants are used by being contacted with cobalt, nickel, or cobalt and nickel containing aqueous solutions. On mixing, the cobalt and/or nickel values are taken up by the organic as cobalt or nickel mercaptides. These may then be stripped of cobalt and nickel by treatment with an aqueous alkaline solution and carbon monoxide.

REFERENCES:
patent: 2191753 (1940-02-01), Coffman
Clingman, A. et al., "Selective Liquid Ion-Exchangers", J. Appl. Chem. 13, May 1963, pp. 193-198.
Mehrotra R., et al., "Thiol and Thio-.beta.-Diketone Derivatives of Some Elements", Inorganica Chimica Acta Reviews (1968), pp. 111-116.
Swan, C. et al., "Complexes of Co, Ni, Tl, Pd with Some Mercapto Compounds", Chemistry and Industry, 8/12/67, pp. 1363-1364.

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