C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/310
C22B 3/38 (2006.01)
Patent
CA 1098322
ABSTRACT OF THE DISCLOSURE A process for the separation of cobalt from nickel by solvent extraction comprises contacting an aqueous solution containing divalent cobalt and nickel ions in the octahedral configuration with an organic phase comprising a solvent extraction agent containing an ester of phosphoric acid and then separating the organic phase containing cobalt from the aqueous phase containing nickel. The contacting is carried out at a temperature in the range of 40°C to 90°C with a concentration of 11 to 16.0 grams per liter of cobalt in the organic phase so as to convert substantially all the cobalt present in the organic phase from an octahedral configuration to a tetrahedral configuration and thus enable the said organic phase to preferentially extract cobalt rather than nickel, the latter remaining in the octahedral configuration and in the aqueous phase.
294769
Johnston N. Malcolm S.
Matthey Rustenburg Refiners (proprietary) Limited
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