Polyvinyl alcohol-graft-benzo-15-crown-5 ether for lithium isotopes separation by liquid–solid extraction

被引：1
作者：
Feng Yan
Hao Liu
Hongchang Pei
Jianxin Li
Zhenyu Cui
Benqiao He
机构：
[1] Tianjin Polytechnic University,State Key Laboratory of Separation Membranes and Membrane Processes
[2] Tianjin Polytechnic University,School of Environmental and Chemical Engineering
[3] Tianjin Polytechnic University,School of Materials Science and Engineering
来源：
Journal of Radioanalytical and Nuclear Chemistry | 2017年 / 311卷
关键词：
Liquid–solid extraction; Polyvinyl alcohol; 4′-formoxylbenzo-15-crown-5 ether; Lithium isotopes separation; Separation factor;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A film material, polyvinyl alcohol-graft-benzo-15-crown-5 ether (PVA-g-B15C5) for lithium isotope separation by liquid–solid extraction was prepared from polyvinyl alcohol (PVA) and 4′-formoxylbenzo-15-crown-5 ether (FB15C5). The effect of immobilization amount of crown ether on film, the counter anion of lithium salt, extraction solvent and temperature on separation factor were explored in detail. The maximum separation factor 1.060 ± 0.002 was obtained by an isopropanol-LiI/PVA-g-B15C5 film system at 20 °C. The heavy isotope, 7Li was enriched in the film phase owning to a stronger bonding environments from the synergistic effect of B15C5 and hydrophilic PVA as well as the linking groups.
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页码：2061 / 2068
页数：7
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