Preparation of high-purity neodymium chloride by solvent extraction in the mixer-settlers:A pilot-scale investigation
来源期刊：Journal of Rare Earths2017年第11期
论文作者：Fujian Li Qiaoyan He Yanliang Wang Hong Zhou Shuibo Zhang Xiaoqi Sun
文章页码：1133 - 1140
摘 要：A novel purification process based on mixer-settlers for high-purity NdCl3 was developed. Acidic solution and pure NdCl3 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 NdCl3 in mixersettlers was studied. Based on the investigation mentioned above, the pilot-scale purification process for NdCl3 with a purity of 99.999% was developed, and the total recovery was about 99%.
Fujian Li1,2,3,4，Qiaoyan He4，Yanliang Wang1,2,3，Hong Zhou4，Shuibo Zhang4，Xiaoqi Sun1,2,3
1. Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences2. Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences3. University of Chinese Academy of Sciences4. Ganzhou Rare Earth Group Co.,Ltd.,China Southern Rare Earth
摘 要：A novel purification process based on mixer-settlers for high-purity NdCl3 was developed. Acidic solution and pure NdCl3 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 NdCl3 in mixersettlers was studied. Based on the investigation mentioned above, the pilot-scale purification process for NdCl3 with a purity of 99.999% was developed, and the total recovery was about 99%.
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