Metal recovery from sulfate solutions

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 23/00 (2006.01) C01G 3/00 (2006.01) C01G 9/00 (2006.01) C01G 51/00 (2006.01) C01G 53/00 (2006.01) C22B 3/26 (2006.01) C22B 3/30 (2006.01) C22B 3/36 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1053914

ABSTRACT Nickel, cobalt, copper or zinc is recovered from a sulfate solution by mixing the solution with a organic phase containing a chelating reagent and con- trolling the pH with a solid calcium base to a value lower than that at which the metal in question hydrolyzes.

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