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

作　　者：Na Wang Fujian Li Bangyu Fan Suojiang Zhang Lu Bai Xiangping Zhang 

机构地区：[1]College of Chemical and Engineering,Zhengzhou University,Zhengzhou 450001,China [2]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 Manufacture,Chinese Academy of Sciences,Beijing 100190,China [3]Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341000,China [4]College of Chemistry,Nanchang University,Nanchang 330031,China

出　　处：《Frontiers of Chemical Science and Engineering》2022年第11期1584-1594,共11页化学科学与工程前沿（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China(Grant No.22008244);Rare Earth Industry Guidance Fund Project(Grant No.IAGM2020DB03);Self-Deployed Projects of Ganjiang Innovation Academy,Chinese Academy of Sciences(Grant No.E055A002);the Key Research Programof theChinese Academy of Sciences(Grant No.ZDRW-CN-2021-3-2)and Special Research Assistant Project of the Chinese Academy of Sciences.

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 quasi-liquid system strategy provides a possibility of the novel,green,and efficient method for rare earth separation.

关 键 词：rare earth element different magnetic moment magnetic separation ionic liquid 

分 类 号：O61[理学—无机化学]