Title:
METHOD FOR PROCESSING LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/176545
Kind Code:
A1
Abstract:
A method for processing a lithium ion secondary battery according to the present invention comprises: a grinding and classification step (S02) in which a lithium ion secondary battery is ground and classified so as to obtain an electrode material that contains at least lithium; a leaching step (S03) in which the electrode material is immersed in an acid so as to obtain a leachate; a pH adjustment step (S04) in which the pH of the leachate is adjusted by adding lithium hydroxide thereto; a metal recovery step (S05) in which metals other than lithium are recovered from the leachate so as to obtain a lithium-containing liquid; and a lithium hydroxide recovery step (S06) in which lithium in the lithium-containing liquid is recovered in the form of lithium hydroxide. The lithium hydroxide recovered in the lithium hydroxide recovery step (S06) is used in the pH adjustment step (S04).
Inventors:
KAWASAKI HAJIME (JP)
HAYASHI HIROSHI (JP)
SATOU RYOUSUKE (JP)
HAYASHI HIROSHI (JP)
SATOU RYOUSUKE (JP)
Application Number:
PCT/JP2023/008294
Publication Date:
September 21, 2023
Filing Date:
March 06, 2023
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
C22B1/00; C22B3/06; C22B3/26; C22B3/44; C22B7/00; C22B26/12; C25B1/16
Foreign References:
| JP2020132951A | 2020-08-31 | |||
| JP2021150282A | 2021-09-27 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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