Title:
METHOD FOR RECOVERING LITHIUM
Document Type and Number:
WIPO Patent Application WO/2022/085635
Kind Code:
A1
Abstract:
A method for recovering lithium from a material that contains fluorine and lithium, wherein: the material is mixed with an aqueous sulfuric acid solution or water, thereby obtaining a mixed solution in which fluorine and lithium in the material have been dissolved; and a purified solution, in which lithium is dissolved, is obtained by means of solid-liquid separation after forming a sediment that contains fluorine and calcium by mixing the mixed solution with a poorly soluble or slightly soluble calcium-containing alkaline agent. It is preferable that, when the mixed solution is obtained, the material that contains fluorine and lithium is mixed with an aqueous sulfuric acid solution or water, and heated at a temperature within the temperature range of from 60°C to 90°C.
Inventors:
ABE TAKURO (JP)
SUZUKI YUSUKE (JP)
KATAYAMA SHINSUKE (JP)
SUZUKI YUSUKE (JP)
KATAYAMA SHINSUKE (JP)
Application Number:
PCT/JP2021/038461
Publication Date:
April 28, 2022
Filing Date:
October 18, 2021
Export Citation:
Assignee:
KANTO DENKA KOGYO KK (JP)
International Classes:
C22B7/00; C22B3/08; C22B3/44; C22B26/12
Domestic Patent References:
| WO2000019557A1 | 2000-04-06 |
Foreign References:
| JP2019160429A | 2019-09-19 | |||
| JP2017537221A | 2017-12-14 | |||
| CN102041380A | 2011-05-04 | |||
| JP2012041621A | 2012-03-01 | |||
| US20190152793A1 | 2019-05-23 | |||
| CN110498433A | 2019-11-26 |
Attorney, Agent or Firm:
SHOWA INTERNATIONAL PATENT FIRM (JP)
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