Title:
METHOD FOR LEACHING LITHIUM
Document Type and Number:
WIPO Patent Application WO/2023/054227
Kind Code:
A1
Abstract:
The present invention provides a method for leaching lithium, the method enabling the achievement of a lithium compound that has a purity sufficient for use in batteries by leaching lithium from lithium titanium oxide that is contained, as a negative electrode active material or the like, in waste lithium ion batteries. A method for leaching lithium according to the present invention leaches lithium from a powder that contains lithium titanium oxide that is obtained from waste lithium ion batteries, and is characterized in that the powder is immersed in a mineral acid that is at a specific concentration and is heated to a temperature of not less than 80°C but less than 95°C.
Inventors:
SAKAI HIROTAKA (JP)
NAKAZAWA JUN (JP)
NAKAZAWA JUN (JP)
Application Number:
PCT/JP2022/035591
Publication Date:
April 06, 2023
Filing Date:
September 26, 2022
Export Citation:
Assignee:
ASAKA RIKEN CO LTD (JP)
International Classes:
C22B26/12; C22B3/10; C22B7/00
Foreign References:
| JP2019160429A | 2019-09-19 | |||
| JP2019169309A | 2019-10-03 |
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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