Separation and recovery of nickel and cobalt in ammoniacal...

Details Separation and recovery of nickel and cobalt in ammoniacal... Separation and recovery of nickel and cobalt in ammoniacal...

C - Chemistry, Metallurgy

22

B

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C22B 3/28 (2006.01) C01G 51/12 (2006.01) C01G 53/00 (2006.01) C22B 3/26 (2006.01) C22B 3/30 (2006.01)

Patent

CA 1335332

A process for the separation and recovery of nickel from an ammoniacal ammonium carbonate liquor containing nickel II ions and cobalt III ions by liquid-liquid extraction where ammoniacal ammonium carbonate solutions are the only aqueous phases involved in the process. The process includes the successive steps of: (a) oxidising the majority of any cobalt II ammines in the ammoniacal liquid to cobalt III; (b) extracting nickel from the ammoniacal liquor with an organic reagent, which reagent may also contain a suitable modifying reagent, to form a nickel loaded organic phase and an ammoniacal ammonium carbonate phase containing cobalt; (c) stripping the nickel loaded organic phase characterised by contacting the organic phase with an ammoniacal ammonium carbonate solution to form a nickel loaded aqueous strip liquor.

567026

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