Recovery of thorium and rare earths from leachate of ion-absorbed rare earth radioactive residues with N1923 and Cyanex■572

作     者：Jia Su Xiangguang Guo Yun Gao Shan Wu Ruigao Xu Xiaoqi Sun Jia Su;Xiangguang Guo;Yun Gao;Shan Wu;Ruigao Xu;Xiaoqi Sun

作者机构：CAS Key Laboratory of Design and Assembly of Functional NanostructuresAnd Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamen 361021China University of Chinese Academy of SciencesBeijing 100039China Longnan County Nanyu Rare Earth Resources Comprehensive Utilization Co.Ltd.Ganzhou 341000China Ganzhou Rare Earth Group Co.Ltd.Ganzhou 341000China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2021年第39卷第10期

页      面：1273-1281,I0004页

核心收录：

学科分类：080603[工学-有色金属冶金] 0709[理学-地质学] 0819[工学-矿业工程] 07[理学] 08[工学] 09[农学] 083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0806[工学-冶金工程] 0708[理学-地球物理学] 0903[农学-农业资源与环境] 0703[理学-化学] 0713[理学-生态学] 

基　　金：supported by the National Key R&D Program of China(2017YFE0106900) Science and Technology Major Project of Ganzhou(2018) Fujian Program for High-Level Entrepreneurial and Innovative Talents Introduction and Science and Technology Service Network Initiative from Chinese Academy of Sciences 

主　　题：Radioactive residues Rare earth Thorium Primary amine N1923 Cyanex?572 

摘      要：Ion-absorbed rare earth ores radioactive residues(IREORR)are a class of waste residue from the production of rare earth elements(REEs).Because of its radioactive dose,IREORR are usually stored in waste *** are difficult to be disposed ***,it contains relatively high concentrations of REEs,which can be considered as a valuable secondary *** this paper,a novel process is developed for the separation of thorium(Th)and recovery of REEs from IREORR hydrochloric acid leachate with primary amine N1923 and Cyanex?572,*** effects of sulfate concentration,extractant concentration and pH on N1923 extraction in hydrochloric acid solution were investigated in *** results show that the extraction capacity of N1923 can be improved by adding sulfate to the solution and increasing the concentration of *** has little effect on the extraction of Th when pH is higher than *** for the stripping,REEs are more easily stripped from loaded organic phase than Th,and nitric acid is a better stripping agent than hydrochloric *** with the extraction of Cyanex■572 for REEs,a fractional extraction experiment for separating Th and enriching of REEs was *** yield of Th is higher than 99.9%and the concentration of REEs is enriched to 183.84 g/L.