Preparation of high-purity neodymium chloride by solvent extraction in the mixer-settlers： A pilot-scale investigation  

作　　者：Fujian Li Qiaoyan He Yanliang Wang Hong Zhou Shuibo Zhang Xiaoqi Sun 

机构地区：[1]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China [2]Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen 361021, PR China [3]University of Chinese Academy of Sciences, Beijing 100039, PR China [4]Ganzhou Rare Earth Group Co., Ltd., China Southern Rare Earth, Ganzhou 341000, PR China

出　　处：《Journal of Rare Earths》2017年第11期1133-1140,共8页稀土学报（英文版）

基　　金：Project supported by'Hundreds Talents Program' from Chinese Academy of Sciences,Science and Technology Major Project of Fujian Province(2015HZ0001-3);National Natural Science Foundation of China(21571179);Science and Technology Major Project of Ganzhou(2017-8)

摘　　要：A novel purification process based on mixer-settlers for high-purity NdClwas developed. Acidic solution and pure NdClsolution were compared to scrub the less-extractable rare earths(REs)(La, Ce, and Pr)from loaded organic phase. The extractant with low-degree saponification was evaluated to remove the more-extractable element(Sm). Then the RE impurities(La, Ce, Pr, and Sm) in Nd were purified by an integrated process. Furthermore, effect of smuggling behavior on the purification of NdClin mixersettlers was studied. Based on the investigation mentioned above, the pilot-scale purification process for NdClwith a purity of 99.999% was developed, and the total recovery was about 99%.A novel purification process based on mixer-settlers for high-purity NdCl_3 was developed. Acidic solution and pure NdCl_3 solution were compared to scrub the less-extractable rare earths(REs)(La, Ce, and Pr)from loaded organic phase. The extractant with low-degree saponification was evaluated to remove the more-extractable element(Sm). Then the RE impurities(La, Ce, Pr, and Sm) in Nd were purified by an integrated process. Furthermore, effect of smuggling behavior on the purification of NdCl_3 in mixersettlers was studied. Based on the investigation mentioned above, the pilot-scale purification process for NdCl_3 with a purity of 99.999% was developed, and the total recovery was about 99%.

关 键 词：Solvent extraction PURIFICATION NEODYMIUM HIGH-PURITY Mixer-settlers 

分 类 号：TQ133.3[化学工程—无机化工]