Title:
METHOD FOR PRODUCING HIGH-PURITY AQUEOUS LITHIUM SALT SOLUTION
Document Type and Number:
WIPO Patent Application WO/2022/071335
Kind Code:
A1
Abstract:
The present invention provides a method for producing a high-purity aqueous lithium salt solution, said method being capable of separating aluminum phosphate by filtration in a short period of time. This method for producing a high-purity aqueous lithium salt solution comprises: a step wherein the pH of a slurry that contains a mixture of aluminum hydroxide and lithium phosphate obtained from a first aqueous lithium salt solution, which is a starting material, is adjusted within the range of from 2 to 3, thereby obtaining a sediment of aluminum phosphate; a step wherein the sediment of aluminum phosphate is removed by being separated by means of filtration, thereby obtaining a second aqueous lithium salt solution; and a step for obtaining a high-purity aqueous lithium salt solution by purifying the second aqueous lithium salt solution.
Inventors:
YAMADA KEITA (JP)
SAKUMA YUKIO (JP)
INOUE HIROTO (JP)
SAKUMA YUKIO (JP)
INOUE HIROTO (JP)
Application Number:
PCT/JP2021/035688
Publication Date:
April 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
ASAKA RIKEN CO LTD (JP)
International Classes:
C01D15/00; C01D3/16; C01D15/08
Domestic Patent References:
| WO2018184876A1 | 2018-10-11 |
Foreign References:
| CN108675323A | 2018-10-19 | |||
| CN110482511A | 2019-11-22 | |||
| CN109052436A | 2018-12-21 | |||
| CN111137869A | 2020-05-12 | |||
| JP2011020892A | 2011-02-03 | |||
| CN108675323A | 2018-10-19 |
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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