Method for separating copper, and nickel and cobalt

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11718894
APP PUB NO 20210180154A1
SERIAL NO

16771419

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a method for separating copper from nickel and cobalt, which can efficiently and selectively separate copper from nickel and cobalt in a substance containing copper, nickel, and cobalt in a waste lithium ion battery, etc. In this method, a substance containing copper, nickel, and cobalt is sulfurated to obtain a sulfide, the obtained sulfide that contains copper, nickel, and cobalt is brought into contact with an acid solution to obtain a solid containing copper and a leachate containing nickel and cobalt. The sulfide preferably contains copper sulfide as a main component, and contains nickel metal and cobalt metal. In-addition, when bringing the sulfide into contact with the acid solution, the added amounts of the sulfide and the acid solution are preferably adjusted such that the oxidation-reduction potential of the obtained leachate is maintained at 150 mV or less where a silver/silver chloride electrode is a reference electrode.

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Patent Owner(s)

  • SUMITOMO METAL MINING CO. LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Higaki, Tatsuya Niihama, JP 27 49
Kobayashi, Hiroshi Niihama, JP 892 9325
Shoji, Hirofumi Niihama, JP 16 58
Takenouchi, Hiroshi Niihama, JP 18 210

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