Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate

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	Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate
	Shi, Chenglong 1,2; Jia, Yongzhong1 ; Zhang, Chao 1,2; Liu, Hong 3; Jing, Yan1
	2015
发表期刊	FUSION ENGINEERING AND DESIGN
卷号	90 页码:1-6
关键词	Lithium Ionic Liquid Solvent Extraction Clo4- Tributyl Phosphate
摘要	Lithium is known as the energy metal and it is a key raw material for preparing lithium isotopes which have important applications in nuclear energy source. In this work, a typical room temperature ionic liquid (RTILs), 1-butyl-3-methyl-imidazolium hexafluorophosphate ([C(4)mim][PF6]), was used as an alternative solvent to study liquid/liquid extraction of lithium from salt lake brine. In this system, the ionic liquid, NaClO4 and tributyl phosphate (TBP) were used as extraction medium, co-extraction reagent and extractant respectively. The effects of solution pH value, phase ratio, ClO4- amount and other factors on lithium extraction efficiency had been investigated. Optimal extraction conditions of this system include the ratio of TBP/IL at 4/1 (v/v), O/A at 2:1, n(ClO4-)/n(Li+) at 2:1, the equilibration time of 10 min and unadjusted pH. Under the optimal conditions, the single extraction efficiency of lithium was 87.28% which was much higher than the conventional extraction system. Total extraction efficiency of 99.12% was obtained by triple-stage countercurrent extraction. Study on the mechanism revealed that the use of ionic liquid increased the extraction yield of lithium through cation exchange in this system. Preliminary results indicated that the use of [C(4)mim][PF6] as an alternate solvent to replace traditional organic solvents (VOCs) in liquid/liquid extraction was very promising. (C) 2014 Elsevier B.V. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5742
专题	中国科学院青海盐湖研究所盐湖资源综合利用工程技术中心青海盐湖研究所知识仓储
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qinghai Salt Chem Prod Supervis & Inspect Ctr, Golmud 816000, Peoples R China
推荐引用方式 GB/T 7714	Shi, Chenglong,Jia, Yongzhong,Zhang, Chao,et al. Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate[J]. FUSION ENGINEERING AND DESIGN,2015,90:1-6.
APA	Shi, Chenglong,Jia, Yongzhong,Zhang, Chao,Liu, Hong,&Jing, Yan.(2015).Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate.FUSION ENGINEERING AND DESIGN,90,1-6.
MLA	Shi, Chenglong,et al."Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate".FUSION ENGINEERING AND DESIGN 90(2015):1-6.