公开(公告)号：US10711324B2

公开(公告)日：2020-07-14

申请号：US16300565

申请日：2017-07-05

申请人： SOOCHOW UNIVERSITY

发明人： Shuao Wang ,  Huangjie Lu ,  Yaxing Wang

IPC分类号： C22B60/02 ,  C22B3/44 ,  C30B7/14 ,  C01B19/00 ,  C22B59/00 ,  C30B29/10 ,  C30B29/46 ,  C30B7/10

摘要： The present invention relates to a method for removing radioactive element thorium in a rare earth mineral, comprising: mixing the rare earth mineral with selenium dioxide in water, reacting radioactive element thorium with selenium dioxide by hydrothermal method, cooling to form a crystal, and separating the crystal to remove the radioactive element thorium. In the invention, tetravalent element thorium is selectively bound to inorganic ligand selenium dioxide in a hydrothermal environment to form a crystal, thereby achieving removal of radioactive element thorium. The method has high crystallization rate and high decontamination efficiency, and removes thorium from trivalent lanthanide element by crystallization solidification under a uniform reaction condition. Compared to a conventional industrial method for thorium separation, the method has low energy consumption and high separation ratio, enables one-step solidification separation, and effectively avoids the disadvantages of redundant separation operations and a large amount of organic and radioactive liquid wastes.