Title:
METHOD FOR PRODUCING LITHIUM-CONTAINING SOLUTION AND METHOD FOR PRODUCING LITHIUM HYDROXIDE
Document Type and Number:
WIPO Patent Application WO/2023/074442
Kind Code:
A1
Abstract:
Provided are a method for producing a lithium-containing solution and a method for producing lithium hydroxide that make it possible to raise the purity of a lithium compound finally obtained. This method for producing a lithium-containing solution includes an ion exchange step for obtaining a lithium-containing solution containing less of a prescribed metal element than a pre-treatment lithium-containing solution by using an ion-exchange resin. In the ion exchange step, the pre-treatment lithium-containing solution is passed through a column equipped with the ion-exchange resin to remove the prescribed metal element. A predetermined amount of the pre-treatment lithium-containing solution from when the pre-treatment lithium-containing solution begins to flow through the column is not included in the lithium-containing solution. This makes it possible to remove the metal element to be removed that is included in the solution passing through in the initial stage while suppressing the amount of pre-treatment lithium-containing solution wasted and to reduce the metal content to be removed in the lithium-containing solution.
Inventors:
TAKANO MASATOSHI (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
SENBA YUSUKE (JP)
ASANO SATOSHI (JP)
HEGURI SHIN-ICHI (JP)
SENBA YUSUKE (JP)
Application Number:
PCT/JP2022/038609
Publication Date:
May 04, 2023
Filing Date:
October 17, 2022
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C01D15/02; B01J45/00; C02F1/42; C22B26/12; H01M4/525
Domestic Patent References:
| WO2012026061A1 | 2012-03-01 | |||
| WO2021166479A1 | 2021-08-26 |
Foreign References:
| CN109516479A | 2019-03-26 | |||
| JP2010285655A | 2010-12-24 | |||
| JP2003293050A | 2003-10-15 | |||
| JP2011252711A | 2011-12-15 | |||
| JP2011032151A | 2011-02-17 | |||
| JP2020132951A | 2020-08-31 | |||
| JP2020193130A | 2020-12-03 |
Attorney, Agent or Firm:
YAMAUCHI PATENT ATTORNEYS (JP)
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