Title:
METHOD FOR RECOVERING LITHIUM FROM BRINE
Document Type and Number:
WIPO Patent Application WO/2021/085777
Kind Code:
A1
Abstract:
The present invention relates to a method for recovering lithium from brine, and provides a method for recovering lithium from brine, the method comprising: (a) an impurity removal step of adding a carbonate supply source to brine including lithium, magnesium and calcium to precipitate and remove magnesium and calcium impurities; (b) a pH adjusting step of adding an acid to the brine from which the impurities have been removed, to adjust the pH of the brine; (c) a lithium-aluminum compound recovery step of adding an aluminum supply source to the pH-adjusted brine to recover a lithium-aluminum compound; (d) a lithium sulfate and aluminum oxide formation step of adding the lithium-aluminum compound to a sulfur supply source and calcining same to form lithium sulfate and aluminum oxide; and (e) a lithium sulfate solution yield step of selectively dissolving lithium sulfate from among the formed lithium sulfate and aluminum oxide to yield a lithium sulfate solution.
Inventors:
PARK IN SU (KR)
HONG HYE-JIN (KR)
SUH CHANG-YOUL (KR)
PARK SUKJOON (KR)
LEE MYUNGGYU (KR)
HONG HYE-JIN (KR)
SUH CHANG-YOUL (KR)
PARK SUKJOON (KR)
LEE MYUNGGYU (KR)
Application Number:
PCT/KR2020/007000
Publication Date:
May 06, 2021
Filing Date:
May 29, 2020
Export Citation:
Assignee:
KOREA INST GEOSCIENCE & MINERAL RESOURCES (KR)
International Classes:
C22B26/12; C01D15/06; C22B3/08
Foreign References:
| KR101944519B1 | 2019-02-01 | |||
| KR101238890B1 | 2013-03-04 | |||
| KR101944518B1 | 2019-02-01 | |||
| JP6559754B2 | 2019-08-14 | |||
| KR102059858B1 | 2019-12-27 |
Attorney, Agent or Firm:
DAE-A INTELLECTUAL PROPERTY CONSULTING (KR)
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