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Liquid-liquid extraction separation of lithium isotopes by using room-temperature ionic liquids-chloroform mixed solvent system contained benzo-15-crown-5
Xiao, Jiang1,2; Jia, Yongzhong1; Shi, Chenglong1; Wang, Xingquan1; Yao, Ying1; Jing, Yan1
2016-11-01
Source PublicationJOURNAL OF MOLECULAR LIQUIDS
Volume223Pages:1032-1038
SubtypeArticle
AbstractA novel liquid-liquid extraction system was investigated for the selective separation of lithium isotopes using ionic liquids.(ILs = [C(6,8,10,12)mim](+)[PF6](-)) as extraction solvent and benzo-15-crown-5 (B15C5) as extractant. The effects of the concentration of lithium salt, counter anion of lithium salt, initial pH of aqueous phase, and extraction temperature on the lithium isotopes separation were studied. The maximum single-stage separation factor alpha of Li-6/Li-7 obtained in the present study was 1.038 +/- 0.002, indicating the lighter isotope Li-6 was enriched in organic phase while the heavier isotope Li-7 was concentrated in the aqueous phase. The formation of 2:1 complex Li(B15C5)(2)(+) in the IL phase was determined on the basis of slope analysis method. The large value of the free energy change (-G(0) = 77.87J mol(-1)) indicated the high separation capability of the lithium isotopes by B15C5/30%CH3Cl-70% C(6)mimPF(6) mixture extraction system. Lithium in Li(B15C5)(2)(+) complex was stripped by 0.5 mol center dot L-1 HCl solution. The extraction system offers high efficiency, simplicity application prospect to separation lithium isotope separation from LiCl solution. (c) 2016 Elsevier B.V. All rights reserved.
KeywordLithium Isotopes Separation Solvent Extraction Ionic Liquid Benzo-15-crown-5 Separation Factor
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordMONOBENZO-15-CROWN-5 RESIN ; CROWN-ETHERS ; BASES HSAB ; SOFT ACIDS ; CHROMATOGRAPHY ; STRATEGY ; AMALGAM ; GREEN ; HARD
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Physics
WOS SubjectChemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000386986300124
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Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6360
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
Affiliation1.Chinese Acad Sience, Qinghai Inst Salt Lakes, Key Lab Compehens & Highly Uitilzat Salt Lakes Re, Xining 810008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xiao, Jiang,Jia, Yongzhong,Shi, Chenglong,et al. Liquid-liquid extraction separation of lithium isotopes by using room-temperature ionic liquids-chloroform mixed solvent system contained benzo-15-crown-5[J]. JOURNAL OF MOLECULAR LIQUIDS,2016,223:1032-1038.
APA Xiao, Jiang,Jia, Yongzhong,Shi, Chenglong,Wang, Xingquan,Yao, Ying,&Jing, Yan.(2016).Liquid-liquid extraction separation of lithium isotopes by using room-temperature ionic liquids-chloroform mixed solvent system contained benzo-15-crown-5.JOURNAL OF MOLECULAR LIQUIDS,223,1032-1038.
MLA Xiao, Jiang,et al."Liquid-liquid extraction separation of lithium isotopes by using room-temperature ionic liquids-chloroform mixed solvent system contained benzo-15-crown-5".JOURNAL OF MOLECULAR LIQUIDS 223(2016):1032-1038.
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