- 专利标题: Method for removing radioactive element thorium in rare earth mineral
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申请号: US16300565申请日: 2017-07-05
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公开(公告)号: US10711324B2公开(公告)日: 2020-07-14
- 发明人: Shuao Wang , Huangjie Lu , Yaxing Wang
- 申请人: SOOCHOW UNIVERSITY
- 申请人地址: CN Suzhou
- 专利权人: SOOCHOW UNIVERSITY
- 当前专利权人: SOOCHOW UNIVERSITY
- 当前专利权人地址: CN Suzhou
- 代理机构: SZDC Law P.C.
- 优先权: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@59412bdc
- 国际申请: PCT/CN2017/091765 WO 20170705
- 国际公布: WO2018/227674 WO 20181220
- 主分类号: C22B60/02
- 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.
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