Recovery of nickel from copper refinery tankhouse electrolyte

Details Recovery of nickel from copper refinery tankhouse electrolyte Recovery of nickel from copper refinery tankhouse electrolyte

C - Chemistry, Metallurgy

22

B

C22B 23/00 (2006.01) C22B 3/44 (2006.01) C22B 15/00 (2006.01) C25C 1/12 (2006.01) C25D 21/18 (2006.01)

Patent

CA 2237710

A method is provided for recovering nickel from a copper refinery tankhouse electrolyte as a nickel containing or nickel-copper containing cake. According to this method, a portion of the electrolyte is decopperized to a desired level of copper concentration and the so decopperized solution is subjected to an acid retardation operation, so as to separate it into a strong acid stream and a weak acid stream. The strong acid stream is then recycled to the refinery tankhouse, while the weak acid stream containing a major proportion of the nickel and of copper, if any, remaining after decopperization, is neutralized to form a precipitate which is then filtered and washed to form the final product.

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