C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/42 (2006.01) C22B 3/26 (2006.01) C22B 23/00 (2006.01)
Patent
CA 2134490
A process for the preparation and purification of a cobalt intermediate from a cobalt sulphate solution containing cationic and anionic impurities, including the successive steps of: (i) reacting the cobalt sulphate solution with an organic reagent to extract unwanted cationic impurities from the sulphate solution; (ii) extracting the cobalt from the sulphate solution with an organic reagent, to create a cobalt loaded organic phase substantially free of all anionic impurities; (iii) stripping the cobalt loaded organic phase with a high strength ammoniacal ammonium carbonate solution, to create an ammoniacal ammonium carbonate strip liquor rich in cobalt II ammines; (iv) converting the cobalt II ammines to cobalt III tetrammines; (v) extracting the majority of nickel from the cobalt rich ammoniacal liquor with a suitable organic reagent; and (vi) recovering the cobalt from the cobalt rich ammoniacal liquor.
Davis Michael R.
Fittock John E.
Price Malcolm J.
Reid John G.
White David T.
Queensland Nickel Pty. Ltd.
Sim & Mcburney
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