Title:
METAL RECOVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2024/053147
Kind Code:
A1
Abstract:
A method for recovering a metal from a battery powder of waste lithium ion batteries, wherein a metal-containing solution that is obtained by leaching the battery powder contains lithium ions, magnesium ions, and at least one kind of metal ions selected from among nickel ions and cobalt ions. This method comprises: a metal extraction step in which a solvent containing a carboxylic acid-based extractant is used in such a manner that the equilibrium pH during the extraction is 6.3 to 7.2, and the metal ions are extracted from the metal-containing solution into the solvent, thereby obtaining a post-metal extraction liquid that contains lithium ions and magnesium ions; and a magnesium extraction step in which a solvent containing a phosphonic acid ester-based extractant is used in such a manner that the equilibrium pH during the extraction is 4.5 to 6.0, and magnesium ions are extracted from the post-metal extraction liquid into the solvent, thereby obtaining a lithium-containing solution that contains lithium ions.
Inventors:
ARAKAWA JUNICHI (JP)
Application Number:
PCT/JP2023/014766
Publication Date:
March 14, 2024
Filing Date:
April 11, 2023
Export Citation:
Assignee:
JX METALS CORP (JP)
International Classes:
C22B7/00; C22B3/06; C22B3/32; C22B3/38; C22B3/44; C22B23/00; C22B26/12; C22B26/22
Foreign References:
| JP2021172856A | 2021-11-01 | |||
| JP2003277846A | 2003-10-02 | |||
| JP2019157188A | 2019-09-19 | |||
| JP7100217B1 | 2022-07-12 | |||
| JP7100211B1 | 2022-07-12 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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