Title:
METHOD FOR REMOVING IMPURITIES, AND METHOD FOR RECOVERING METALS
Document Type and Number:
WIPO Patent Application WO/2024/014540
Kind Code:
A1
Abstract:
Provided are a method for removing impurities that can effectively remove impurities such as fluoride ions, and a method for recovering metals.
The method for removing impurities from a metal-containing solution obtained by leaching battery powder of lithium ion battery waste with an acid, the method including: a metal separation step of separating other metal ions from the metal-containing solution containing lithium ions and the other metal ions; and, after the metal separation step, an electrodialysis step of subjecting the metal-containing solution containing lithium ions, and fluoride ions as impurities, to electrodialysis using a bipolar membrane to obtain a lithium hydroxide solution and an acidic solution, wherein the lithium hydroxide solution is used as a pH adjusting agent in the metal separation step.
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Inventors:
ARAKAWA JUNICHI (JP)
KASHIMURA HIROMICHI (JP)
KAMIYAMA ERIKO (JP)
KASHIMURA HIROMICHI (JP)
KAMIYAMA ERIKO (JP)
Application Number:
PCT/JP2023/026110
Publication Date:
January 18, 2024
Filing Date:
July 14, 2023
Export Citation:
Assignee:
JX METALS CORP (JP)
International Classes:
C22B3/22; C22B3/42; C22B7/00; C22B21/00; C25B1/16; H01M10/54
Domestic Patent References:
| WO2018181816A1 | 2018-10-04 | |||
| WO2018181816A1 | 2018-10-04 |
Foreign References:
| EP3950978A1 | 2022-02-09 | |||
| CN108517409A | 2018-09-11 | |||
| CN109402394B | 2020-06-02 | |||
| CN113955753A | 2022-01-21 | |||
| CN108069447A | 2018-05-25 | |||
| JPH1197076A | 1999-04-09 | |||
| JP2012171827A | 2012-09-10 | |||
| CN111254294B | 2021-07-23 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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