Study on Transfer and Interfacial Kinetics of Neodymium and Samarium in Membrane Based Extraction
来源期刊：JOURNAL OF RARE EARTHS2002年第3期
论文作者：罗芳 吴庸烈 李德谦 马玖彤 张凤君
Key words：rare earths; hollow fiber membrane extraction; transfer kinetics;
Abstract: Extraction and interfacial kinetics of Nd3+ and Sm3+ with HEH/EHP-kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane extractor are the same as those in the liquid-liquid extraction, which can be expressed as a quasi-first-order reaction. The effect of acidity in aqueous phase, concentrations of extractant, Nd3+ and Sm3+ on extraction rate were discussed and the corresponding reaction series were obtained. The reaction equations, reaction rate constants and the separation constant were obtained.
罗芳1，吴庸烈1，李德谦1，马玖彤2，张凤君2
(1.Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China;
2.Department of Chemistry, Jilin University, Changchun 130026, China)
Abstract:Extraction and interfacial kinetics of Nd3+ and Sm3+ with HEH/EHP-kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane extractor are the same as those in the liquid-liquid extraction, which can be expressed as a quasi-first-order reaction. The effect of acidity in aqueous phase, concentrations of extractant, Nd3+ and Sm3+ on extraction rate were discussed and the corresponding reaction series were obtained. The reaction equations, reaction rate constants and the separation constant were obtained.
Key words:rare earths; hollow fiber membrane extraction; transfer kinetics;
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