Rare-earth separation based on the differences of ionic magnetic moment via quasi-liquid strategy

被引：0
作者：
Na Wang
Fujian Li
Bangyu Fan
Suojiang Zhang
Lu Bai
Xiangping Zhang
机构：
[1] Zhengzhou University,College of Chemical and Engineering
[2] Chinese Academy of Sciences,CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering and Innovation Academy for Green Ma
[3] Chinese Academy of Sciences,Ganjiang Innovation Academy
[4] Nanchang University,College of Chemistry
来源：
Frontiers of Chemical Science and Engineering | 2022年 / 16卷
关键词：
rare earth element; different magnetic moment; magnetic separation; ionic liquid;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The separation of rare earth elements is particularly difficult due to their similar physicochemical properties. Based on the tiny differences of ionic radius, solvent extraction has been developed as the “mass method” in industry with hundreds of stages, extremely intensive chemical consumption and large capital investments. The differences of the ionic magnetic moment among rare earths are greater than that of ionic radius. Herein, a novel method based on the large ionic magnetic moment differences of rare earth elements was proposed to promote the separation efficiency. Rare earths were firstly dissolved in the ionic liquid, then the ordering degree of them was improved with the Z-bond effect, and finally the magnetic moment differences between paramagnetic and diamagnetic rare earths in quasi-liquid system were enhanced. Taking the separation of Er/Y, Ho/Y and Er/Ho as examples, the results showed that Er(III) and Ho(III) containing ionic liquids had obvious magnetic response, while ionic liquids containing Y(III) had no response. The separation factors of Er/Y and Ho/Y were achieved at 9.0 and 28.82, respectively. Magnetic separation via quasiliquid system strategy provides a possibility of the novel, green, and efficient method for rare earth separation.
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页码：1584 / 1594
页数：10
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