Reversed micellar solubilization extraction and separation of thorium(IV) from rare earth(III) by primary amine N1923 in ionic liquid
Reversed micellar solubilization extraction and separation of thorium(IV) from rare earth(III) by primary amine N1923 in ionic liquid
复制标题
DOI：
10.1016/j.seppur.2008.07.014
复制
发表时间：
2008-11
影响因子：
8.6
通讯作者：
Yong-gang Zuo;Ji Chen;Deqian Li
中科院分区：
文献类型：
--
作者：
Yong-gang Zuo;Ji Chen;Deqian Li
本文系统研究了伯胺N1923在咪唑基离子液体(IL)即1-辛基-3-甲基咪唑六氟磷酸盐([C8mim]PF6)中萃取硫酸钍(IV)的行为。结果表明，提取行为与使用常规溶剂作为稀释剂的提取行为有很大不同。通过斜率分析法和偏光显微镜（POM）/透射电子显微镜（TEM）观察，提出了N1923/[C8mim]PF6萃取钍（IV）的反胶束增溶萃取机理。盐析剂 Na2SO4 被证明可以促进这种萃取机制。研究了 N1923/[C8mim]PF6 对几种稀土 (III) (La、Ce、Nd、Gd、Er) 的萃取，以评估 Th(IV) 和稀土 (III) (RE(III)) 之间的分离系数。在此基础上，我们对使用离子液体作为稀释剂在清洁工艺中分离Th(IV)和RE(III)的可能性进行了初步评估。
The extraction behavior of thorium(IV) sulfate by primary amine N1923 in imidazolium-based ionic liquid (IL) namely 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim]PF6) was systematically studied in this paper. Results showed that the extraction behavior was quite different from that using conventional solvent as diluent. A reversed micellar solubilization extraction mechanism was proposed for the extraction of thorium(IV) by N1923/[C8mim]PF6via slope analysis method and polarized optical microscopy (POM)/transmission electron microscopy (TEM) observation. The salt-out agent, Na2SO4, was demonstrated to prompt this extraction mechanism. The extraction of several rare earths(III) (La, Ce, Nd, Gd, Er) by N1923/[C8mim]PF6was investigated to evaluate the separation coefficients between Th(IV) and rare earth(III) (RE(III)). On this basis, we made a preliminary assessment for the possibility of using ionic liquid as diluent for the separation of Th(IV) from RE(III) in clean process.