两相滴定法研究2-乙基己基膦酸单2-乙基己基酯从盐酸介质中萃取钕(Ⅲ)的动力学  

Study on the Extraction Kinetics of Neodymium With 2-Ethyl-hexylphosphonic Acid Mono-2-ethylhexyl Ester by the Two Phase Titration

作　　者：孙都成[1] 鲁文杰[1] 于媛[1] 王永平[1] 李德谦[2] 

机构地区：[1]新疆大学化学系,乌鲁木齐830046 [2]中国科学院长春应用化学研究所

出　　处：《分析化学》1994年第7期652-655,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：本文利用两相滴定法作为分析手段,用恒界面池搅拌法考察了多种因素对2-乙基己基膦酸单2-乙基己基酯(HEHEHP,HA)从盐酸介质中萃取Nd(Ⅲ)动力学的影响,从实验结果推论出萃取过程为界面化学反应控制型机理。The extractiohn kinetics and mechanism of neodymium(Ⅲ) from chloride medium with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester ( HEHEHP) were studied by means of two phase titration and stationary interface stirring cell. The effects of the stirring speed, interfacial area between two phases, the concentration of H+,Nd3-,Cl- and HEHEHP on the extraction rate have been investigated. The results indicate the extraction process is controlled by the interfacial reaction when the stirring speed is over 200 r/min.

关 键 词：钕 两相滴定法 盐酸介质 HEHEHP 

分 类 号：O643.1[理学—物理化学]