Title:
METHOD FOR RECOVERING LITHIUM FROM LITHIUM-SALT-CONTAINING AQUEOUS SOLUTION
Document Type and Number:
WIPO Patent Application WO/2023/140084
Kind Code:
A1
Abstract:
Provided is a method for recovering lithium from an aqueous solution in which a lithium salt is dissolved, the lithium being recovered in a short time using small equipment. The method for recovering lithium from a lithium-salt-containing aqueous solution includes an aluminum hydroxide generation step for generating aluminum hydroxide in the lithium-salt-containing aqueous solution. In one embodiment of this lithium recovery method, it is preferable that the lithium is recovered while aluminum phosphate is reused. Furthermore, in another embodiment of this lithium recovery method, it is preferable that: aluminum phosphate is removed from a first slurry that contains a mixture of lithium phosphate and aluminum hydroxide and is obtained from a first lithium salt aqueous solution to obtain a second lithium salt aqueous solution; a second slurry obtained by adding an aluminum salt to the second lithium salt aqueous solution is adjusted to specific conditions; and a precipitate of aluminum phosphate is filtered out from the second lithium salt aqueous solution, and a high-purity lithium salt aqueous solution is obtained.
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Inventors:
YAMADA KEITA (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
INOUE HIROTO (JP)
SAKUMA YUKIO (JP)
HIRAOKA TARO (JP)
INOUE HIROTO (JP)
Application Number:
PCT/JP2022/048492
Publication Date:
July 27, 2023
Filing Date:
December 28, 2022
Export Citation:
Assignee:
ASAKA RIKEN CO LTD (JP)
International Classes:
C22B26/12; C01B25/30; C01B25/36; C01D15/02; C01D15/08; C01F7/148; C22B3/22; C22B3/44; C25B1/16
Domestic Patent References:
| WO2020212363A1 | 2020-10-22 | |||
| WO2022071335A1 | 2022-04-07 |
Foreign References:
| JP2021113147A | 2021-08-05 | |||
| CN108675323A | 2018-10-19 | |||
| US20130146476A1 | 2013-06-13 |
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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