封面图片
2022年, 第16卷 第11期
The separation of rare earth elements is particularly difficult due to their similar physicochemical properties. Based on the differences of ionic magnetic moment via quasi-liquid strategy, two typical paramagnetic and diamagnetic rare-earth ions, Er3+ and Y3+, are separated in the external magnetic field. The paramagnetic Er3+ in ionic liquid is rapidly attracted to the permanent magnet and gathered around the magnet finally, while the diamagnetic Y3+ has no response with the magnet. The ionic liquid herein provides a quasi-liquid surrounding of the rare-earth ions, which efficiently promotes the magnetism differences of Er3+ and Y3+. The separation factors of Er/Y can be achieved at 9.0, six times of that in the traditional 2-ethylhexylphosphonic acid mono-(2-ethylhexyl) ester(P507)-HCl-kerosene system. Meanwhile, the separation factors of Ho/Y, another neighboring rare earth elements as a challenging separation couple, is up to 28.82 with the similar process. Magnetic separation via quasi-liquid system strategy provides a possibility of the novel, green, and efficient method for rare earth separation. (Na Wang, Fujian Li, Bangyu Fan, Suojiang Zhang, Lu Bai, Xiangping Zhang, pp. 1584–1594)[展开] ...
ISSN 2095-0179 (Print)
ISSN 2095-0187 (Online)
CN 11-5981/TQ
Postal Subscription Code 80-969 Formerly Known as Frontiers of Chemical Science and Engineering in China 2018 Impact Factor: 2.809