Lithium isotope separation by crown ethers of different nitrogen-containing derivatives in the ionic liquid-anisole system

被引：18

作者：

Liu, Bing ^{[1
,2
,3
]}

Wang, Su ^{[1
,2
,3
]}

Jia, Yongzhong ^{[1
,2
]}

Zhu, Wenbo ^{[1
,2
,3
]}

Zhang, Quanyou ^{[1
,2
]}

Wang, Xingquan ^{[1
,2
]}

Yao, Ying ^{[1
,2
]}

Jing, Yan ^{[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 810008, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2018年 / 272卷

基金：

中国国家自然科学基金;

关键词：

Lithium isotopes separation; Ionic liquid; Crown ether; Solvent extraction; SOLVENT SYSTEM; EXTRACTION;

D O I：

10.1016/j.molliq.2018.09.105

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：

A green and efficient ionic liquid-anisole extraction system was employed for the separation of lithium isotopes by comparing 4-aminobenzo-15-crown-5 (4-NH2-B15C5), 4-nitrobenzo-15-crown-5 (4-NO2-B15C5) and benzo-15-crown-5 (B15C5) extraction agents. The results of the effects of crown ether substituents, crown ether concentration and lithium salt anion on solvent extraction indicated that the molar ratio of crown ether and lithium ion complex is 2:1 and the order of the extraction efficiency in three extraction agents was 4-NH2-B15C5 > B15C5 > 4-NO2-B15C5. Furthermore, the single-stage separation factor a for Li-6/Li-7 obtained in present work was 1.032 and maximum abundance of Li-6 in organic phase was reached 7.762% in the extraction system of LiI/4-NO2-B15C5-ILs. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：548 / 553

页数：6

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