METHOD FOR TREATING ALLOY

WIPO Patent Application WO/2021/166755

A1

Provided is a method for treating an alloy by which nickel and/or cobalt can be selectively isolated from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium ion battery or the like.　The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper as well as nickel and/or cobalt, the method including: a leaching step in which a leachate is obtained by subjecting an alloy to an acid-based leaching treatment under conditions in which a sulfidizing agent is also present; a reduction step in which a reduced solution is obtained by subjecting the leachate to a reduction treatment using a reducing agent; and an oxidation/neutralization step in which a solution that contains nickel and/or cobalt is obtained by adding an oxidizing agent and also a neutralizing agent to the reduced solution.

TAKENOUCHI HIROSHI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
SHOUJI HIROFUMI (JP)
KUDOU KEIJI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)

PCT/JP2021/004903

August 26, 2021

February 10, 2021

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SUMITOMO METAL MINING CO (JP)

B09B3/00; B22F1/00; B22F9/08; C22B1/02; C22B3/06; C22B3/08; C22B3/26; C22B3/42; C22B3/44; C22B5/04; C22B7/00; C22B15/00; C22B19/20; C22B23/00; H01M10/54

JP2019108586A	2019-07-04
JP2019077912A	2019-05-23
JP2010174366A	2010-08-12
JP2016191134A	2016-11-10
JP2015183292A	2015-10-22
US6440194B1	2002-08-27
JP2012172169A	2012-09-10
JPS63259033A	1988-10-26

SHOBAYASHI Masayuki et al. (JP)

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