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Extraction of lithium from salt lake brine using room temperature ionic liquid in tributyl phosphate
Shi, Chenglong1,2; Jia, Yongzhong1; Zhang, Chao1,2; Liu, Hong3; Jing, Yan1
2015
Source PublicationFUSION ENGINEERING AND DESIGN
Volume90Pages:1-6
SubtypeArticle
AbstractLithium 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.
KeywordLithium Ionic Liquid Solvent Extraction Clo4- Tributyl Phosphate
WOS HeadingsScience & Technology ; Technology
WOS KeywordSEPARATION ; MAGNESIUM
Indexed BySCI
Language英语
WOS Research AreaNuclear Science & Technology
WOS SubjectNuclear Science & Technology
WOS IDWOS:000349508200001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5742
Collection青海盐湖研究所知识仓储
Affiliation1.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
Recommended Citation
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.
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