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Non-equilibrium kinetic separation of thulium,yttrium and erbium on the surface of freely rising oil droplets

查看全文 作　　者：Na [1,2]Sui;Shukai [1,2]Miao;Kaihui [1,2]Cui;Fancheng [3]Meng;Kun [1,2]Huang 高影响力作者 机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing,100083,China;[2]Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals,University of Science and Technology Beijing,Beijing,100083,China;[3]Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190,China高影响力机构 出　　处：《Journal of Rare Earths》索引2024年第42卷第1期,共11页高影响力期刊 基　　金：Project supported by the National Natural Science Foundation of China(51904027,52074031,51574213)。 摘　　要：It is difficult to achieve selective separation and enrichment of different rare earths from high abundance yttrium ores efficiently only dependent on their discrepancy in thermodynamic properties.The present work suggests a new strategy based on non-equilibrium kinetic separation of Er and Tm on the surface of freely rising oil droplets to control the separation order of Y.It is revealed that the mutual separation of Er/Tm is significantly promoted with the separation coefficient of 2.89 during the non-equilibrium extraction with the addition of diethylenetriaminepentaacetic acid(DTPA).The extraction sequence of Tm,Er and Y can be controlled as Tm>Y>Er,thus Y can be selectively enriched during the process of separation of Er and Tm,Such a sequence is subject to the controllable dissociation rates of RE(Ⅲ)-DTPA complexes and extraction abilities of P507 with the three RE(Ⅲ)ions.The dissociation rate is dependent on the stabilities of RE(Ⅲ)-DTPA complexes and follows the sequence ofY(Ⅲ)—DTPA Er>Y to Tm>Y>Er. 关 键 词：DTPA Interface interaction Non-equilibrium kinetic separation Rare earths P507
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