CPC C22B 15/0071 (2013.01) [C22B 3/08 (2013.01); C22B 3/44 (2013.01); C22B 7/003 (2013.01); C22B 15/0056 (2013.01); C22B 23/043 (2013.01)] | 5 Claims |
1. A method for separating copper from nickel and cobalt, the method comprising:
sulfurizing a material containing copper, nickel, and cobalt to obtain a sulfide-containing copper sulfide as a main component and also containing nickel metal and cobalt metal;
bringing the obtained sulfide into contact with an acid solution, which is a solution containing at least one selected from the group consisting of sulfuric acid, hydrochloric acid and nitric acid, to obtain a solid containing copper sulfide and a leachate containing nickel and cobalt; and
wherein when the sulfide is brought into contact with the acid solution, adjusting addition amounts of the sulfide and the acid solution, such that an oxidation-reduction potential of the obtained leachate is maintained at a value of 150 mV or less where a silver/silver chloride electrode is a reference electrode.
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