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Title:
METHOD FOR SEPARATING COPPER, AND NICKEL AND COBALT
Document Type and Number:
WIPO Patent Application WO/2019/124015
Kind Code:
A1
Abstract:
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 for separating copper from nickel and cobalt, 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. Here, 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.

Inventors:
TAKENOUCHI HIROSHI (JP)
KOBAYASHI HIROSHI (JP)
SHOJI HIROFUMI (JP)
HIGAKI TATSUYA (JP)
Application Number:
JP2018/043846
Publication Date:
June 27, 2019
Filing Date:
November 28, 2018
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/06; C22B3/08; C22B3/10; C22B3/44; C22B7/00; C22B15/00
Domestic Patent References:
WO2013077296A12013-05-30
Foreign References:
JP2009097076A2009-05-07
JPS57131332A1982-08-14
JP2012172169A2012-09-10
JPS63259033A1988-10-26
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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