期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 63, 期 1, 页码 61-68出版社
ELSEVIER
DOI: 10.1016/j.seppur.2008.03.038
关键词
ionic liquid-based extraction; immobilization; complexing method; rare earth
资金
- Chinese Academy of Sciences
- National Natural Science Foundation of China [50574080]
- Distinguished Young Scholar Foundation of Jilin Province [20060114]
A kind of solvent (ionic liquid) impreganated resin (IL-SIR) was developed herein for ameliorating imidazolium-type IL-based liquid-liquid extraction of metal ions. In this study, [C(8)mim][PF6] containing Cyanex923 was immobilized on XAD-7 resin for solid-liquid extraction of rare earth (RE). The solid-liquid extraction contributed to ameliorating mass transfer efficiency, i.e. shortening equilibrium time from 40 min to 20 min, increasing extraction efficiency from 29% to 80%. In additional, the novel IL-SIR could separate Y(III) from Sc(III), Ho(III), Er(III), Yb(III) effectively by adding water-soluble complexing agent. Thus, the solid-liquid extraction by IL-SIR coupled with complexing method could be regarded as an effective strategy for improving mass transfer efficiency and increasing selectivity of IL-based liquid-liquid extraction. (C) 2008 Elsevier B.V. All rights reserved
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