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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
发表期刊JOURNAL OF MOLECULAR LIQUIDS
卷号223页码:1032-1038
文章类型Article
摘要A 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.
关键词Lithium Isotopes Separation Solvent Extraction Ionic Liquid Benzo-15-crown-5 Separation Factor
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]MONOBENZO-15-CROWN-5 RESIN ; CROWN-ETHERS ; BASES HSAB ; SOFT ACIDS ; CHROMATOGRAPHY ; STRATEGY ; AMALGAM ; GREEN ; HARD
收录类别SCI
语种英语
WOS研究方向Chemistry ; Physics
WOS类目Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号WOS:000386986300124
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6360
专题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
作者单位1.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
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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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