Extraction of lithium from salt lake brines by bis[(trifluoromethyl)sulfonyl]imide-based ionic liquids

被引：31
|
作者：
Wang, Xingquan [1 ,2 ,3 ]
Jing, Yan [1 ,2 ]
Liu, Hong [4 ]
Yao, Ying [1 ,2 ]
Shi, Chenglong [1 ,2 ,3 ]
Xiao, Jiang [1 ,2 ,3 ]
Wang, Su [1 ,2 ,3 ]
Jia, Yongzhong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
[2] Qinghai Engn & Technol Res Ctr Comprehens Utiliza, Xining, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Qinghai Salt Chem Prod Supervis & Inspect Ctr, Geermu 816099, Peoples R China
来源：
CHEMICAL PHYSICS LETTERS | 2018年 / 707卷
基金：
中国国家自然科学基金;
关键词：
Ionic liquids; Extracting lithium; Brine; TRIBUTYL-PHOSPHATE; SEPARATION; MAGNESIUM; KEROSENE; EQUILIBRIA; METALS; SYSTEM; FECL3; RATIO; OXIDE;
D O I：
10.1016/j.cplett.2018.07.030
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Room-temperature ionic liquids based on the bis ((trifluoromethyl)sulfonyl)-imide anion with the tributyl phosphate (TBP) system employed to extract lithium ion from salt lake brine with a high Mg/Li ratio. The influences of cation structure, concentration of ionic liquid and phase ratio on extraction efficiency were investigated. Results indicated that N-butyl pyridinium bis((trifluoromethyl)sulfonyl)imide (BD) has high extraction efficiency for lithium; tributylmethylammomium bis((trifluoromethyl)sulfonyl)imide (JA) has lower extraction efficiency for lithium and impurity ions but exhibits better selectivity; when cation exchange mechanism occurs during solvent extraction by using ionic liquids as a synergistic extraction agent, the cation more hydrophobic was, the more difficult for it to enter the solution exchange process. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：8 / 12
页数：5
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