Title:
METHOD FOR PROCESSING ALLOY
Document Type and Number:
WIPO Patent Application WO/2023/002912
Kind Code:
A1
Abstract:
The present invention provides a method that is capable of selectively obtaining nickel and/or cobalt from an alloy, which contains copper as well as nickel and/or cobalt, in a waste lithium ion battery or the like. A method for processing an alloy according to the present invention comprises: a leaching step S1 in which an alloy that contains copper as well as nickel and/or cobalt is subjected to a leaching treatment by means of an acid solution in the coexistence of a sulfurizing agent, thereby obtaining a leachate and a leaching residue; and a reduction step S2 in which a reducing agent is added to the thus-obtained leachate so as to reduce the leachate, thereby obtaining a post-reduction solution and a reduction residue. This method for processing an alloy is characterized in that the reduction is carried out in the reduction step S2, while controlling the addition amount of the reducing agent so that the redox potential of the leachate is 0 mV or less as determined where a silver/silver chloride electrode is the reference electrode.
Inventors:
TAKENOUCHI HIROSHI (JP)
HEGURI SHIN-ICHI (JP)
ASANO SATOSHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
HEGURI SHIN-ICHI (JP)
ASANO SATOSHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
Application Number:
PCT/JP2022/027717
Publication Date:
January 26, 2023
Filing Date:
July 14, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B3/04; C22B3/44; C22B3/46; C22B7/00; C22B15/00; C22B23/00
Foreign References:
| JP2019065346A | 2019-04-25 | |||
| JP2019077912A | 2019-05-23 | |||
| JP2019077913A | 2019-05-23 | |||
| JP2015183292A | 2015-10-22 | |||
| JP2019108586A | 2019-07-04 | |||
| JP2012172169A | 2012-09-10 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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