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Title:
LI ISOTOPE SEPARATION AND ENRICHMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/159674
Kind Code:
A1
Abstract:
A Li isotope separation and enrichment method, comprising: uniformly mixing an ionic liquid, a diluent, and a crown ether compound to form an extraction organic phase; then uniformly mixing the extraction organic phase with a lithium salt solution, and collecting a lithium-loaded organic phase after extraction; next, enabling an anode, a cathode, an anolyte, a catholyte, a middle-section bath solution, a first isolation film, and a second isolation film to jointly constitute an electromigration system; and finally, energizing the electromigration system to obtain a catholyte enriched with Li isotopes. The middle bath solution is the collected lithium-loaded organic phase; the first isolation film is provided between the anolyte and the middle-section bath solution; the second isolation film is provided between the middle-section bath solution and the catholyte. A multi-stage continuous separation process is simple to operate, continuous production can be achieved, and the separation efficiency is greatly improved.

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Inventors:
SUN JINHE (CN)
WANG MINGYONG (CN)
HUANG CHAOCHI (CN)
JING YAN (CN)
JIA YONGZHONG (CN)
ZHANG PENGRUI (CN)
SHAO FEI (CN)
ZHANG QIAN (CN)
Application Number:
PCT/CN2020/106596
Publication Date:
August 19, 2021
Filing Date:
August 03, 2020
Export Citation:
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Assignee:
QINGHAI INST SALT LAKES CAS (CN)
International Classes:
B01D59/50; B01D59/24; B01D59/42; C22B26/12
Domestic Patent References:
WO2014127977A12014-08-28
Foreign References:
CN102373341A2012-03-14
CN105536536A2016-05-04
CN108060308A2018-05-22
CN105536537A2016-05-04
CN109200822A2019-01-15
CN202181336U2012-04-04
CN104607046A2015-05-13
JP2012234732A2012-11-29
JP2010029797A2010-02-12
Other References:
WANG, MINGYONG ET AL.: "Lithium isotope separation by electromigration", 《CHEMICAL PHYSICS LETTERS》, vol. 746, 29 February 2020 (2020-02-29), XP086115240, ISSN: 0009-2614, DOI: 10.1016/j.cplett.2020.137290
Attorney, Agent or Firm:
TIANJIN CZTC IP FIRM (CN)
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