Title:
METHOD FOR PREPARING LITHIUM HYDROXIDE USING LITHIUM SULFATE AND BARIUM HYDROXIDE
Document Type and Number:
WIPO Patent Application WO/2022/080571
Kind Code:
A1
Abstract:
The present invention relates to a method for preparing lithium hydroxide using lithium sulfate and barium hydroxide and, more specifically, to a method for preparing lithium hydroxide, comprising the steps of: preparing a first mixture by mixing lithium sulfate (Li 2SO4) and barium hydroxide (Ba(OH) 2) in a predetermined ratio; preparing a second mixture that is converted into insoluble barium sulfate (BaSO4) and water-soluble lithium hydroxide (LiOH) by roasting the first mixture; precipitating the insoluble barium sulfate (BaSO4) by dissolving the second mixture; subjecting the precipitated barium sulfate (BaSO4) to solid-liquid separation; and evaporating the solution from which the barium sulfate (BaSO4) is separated, to obtain lithium hydroxide (LiOH).
Inventors:
KIM MYONG JUN (KR)
Application Number:
PCT/KR2020/016624
Publication Date:
April 21, 2022
Filing Date:
November 23, 2020
Export Citation:
Assignee:
UNIV NAT CHONNAM IND FOUND (KR)
International Classes:
C01D15/02
Foreign References:
| KR20160002578A | 2016-01-08 | |||
| JP2020164969A | 2020-10-08 | |||
| KR20100074105A | 2010-07-01 | |||
| KR101973475B1 | 2019-04-29 |
Other References:
JOO SOYEONG, SHIM HYUN-WOO, CHOI JIN-JU, LEE CHAN-GI, KIM DAE-GUEN: "A Method of Synthesizing Lithium Hydroxide Nanoparticles Using Lithium Sulfate from Spent Batteries by 2-Step Precipitation Method", DAEHAN GEUMSOG JAE'LYO HAGHOEJI = KOREAN JOURNAL OF METALS AND MATERIALS, DAEHAN GEUMSOG JAE'LYO HAGHOE, SEOUL, SOUTH KOREA, vol. 58, no. 4, 5 April 2020 (2020-04-05), Seoul, South Korea , pages 286 - 291, XP055922410, ISSN: 1738-8228, DOI: 10.3365/KJMM.2020.58.4.286
Attorney, Agent or Firm:
IAM PATENT & LAW FIRM (KR)
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