石油亚砜从硝酸介质中萃取铀(Ⅵ)的动力学研究

石油亚砜从硝酸介质中萃取铀(Ⅵ)的动力学研究

摘要

摘要: 用上升单液滴法和恒界面池法研究了石油亚砜－煤油从硝酸介质中萃取铀（Ⅵ）的动力学。萃取速率与水相轴（Ⅵ）浓度的一次方成正比，并于３．０－４．０ｍｏｌ／ｌＨＮＯ＿３和０．３－０．４ｍｏｌ／ｌＰＳＯ处出现速率极大值。萃取速率与试验温度无明显关系，且随恒界面池搅拌器转速提高而线性上升。实验结果表明，萃取过程为扩散控制，萃合物ＵＯ＿２（ＮＯ＿３）＿２·２ＰＳＯ从两相界面扩散至有机相主体是速率控制步骤。

Abstract: KINETIC STUDIES ON THE SOLVENT EXTRACTION OF URANIUM（Ⅵ）FROM NITRIC ACID SOLUTION WITH PETROLEUM SULFOXIDESZHOU ZUMING；JI JIANGUO；CHEN GUOMING；DU HUIFANG（Department of Physics Ⅱ．Fadan Uniuersity，Shanghai，200433）MAO JIAJUN（Research Centre of Analysis and Measurment.Tongji University，Shanghai，200092）ABSTRACT The kinetics of extraction of uranium（Ⅵ） from nitric acid solution by petroleumsulfoxides（PSO ）in kerosene is investigated using single drop and Lewis cell technique. Theextraction rate is found to be pseudo－first order with respect to the concentration ofuranium（ Ⅵ）．At first it increases with increasing concentration of nitric acid or PSO and hasa maximum at 3．0—4．0 mol／l nitric acid and 0．3—0．4 mol／l PSO．The rate is almost inde-pendent of the extraction temperature. It is suggested that the extraction rate of uranium（Ⅵ）is controlled by the diffusion of complex UO_2（NO_3）_2·2PSO from Interface into organicphase. Key words Uranium Extraction Kinetics Petroleum sulfoxides

HTML全文

参考文献(1)

施引文献

资源附件(0)