Title:
TREATMENT METHOD FOR ALLOY
Document Type and Number:
WIPO Patent Application WO/2023/106210
Kind Code:
A1
Abstract:
The present invention provides a method for efficiently obtaining a solution that contains nickel and/or cobalt from lithium ion battery waste or the like, which is an alloy that contains nickel and/or cobalt and copper. The present invention is a treatment method for an alloy, the method being used for the purpose of obtaining a solution that contains nickel and/or cobalt from an alloy that contains nickel and/or cobalt and copper. This treatment method for an alloy comprises a leaching step in which the alloy is subjected to a leaching treatment by adding an acid solution to the alloy in the coexistence of a sulfurizing agent, thereby obtaining a leachate and a leaching residue; and in the leaching step, the leaching treatment is carried out while maintaining the copper concentration in the reaction solution within the range of 0.5 g/L to 15 g/L by adding a divalent copper ion source thereto. Moreover, in the leaching step, the leaching treatment is carried out while maintaining the redox potential of the reaction solution at 50 mV or more, using a silver/silver chloride electrode as a reference electrode.
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Inventors:
TAKENOUCHI HIROSHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
SHOUJI HIROFUMI (JP)
MATSUOKA ITSUMI (JP)
SANJO SHOTA (JP)
MATSUGI TAKUMI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
Application Number:
PCT/JP2022/044424
Publication Date:
June 15, 2023
Filing Date:
December 01, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B3/06; C22B3/44; C22B7/00; C22B15/00; C22B23/00; H01M10/54
Domestic Patent References:
| WO2021166755A1 | 2021-08-26 |
Foreign References:
| JP2021147686A | 2021-09-27 | |||
| JP2019108586A | 2019-07-04 | |||
| CN111807388A | 2020-10-23 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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