磷酸三丁酯从盐酸体系中萃取铀(Ⅵ)的动力学研究

KINETIC STUDIES OF THE SOLVENT EXTRACTION OF URANIUM (Ⅵ) CHLO-RIDE IN THE TBP-HC1 SYSTEM.

摘要: <正> 本文采用上升液滴法,研究了UO_2Cl_2/H_2O-HCl/YBP-环己烷体系的萃取和反萃取过程的动力学。由实验测得,在6MHCl溶液中,TBP萃取U(Ⅵ)的速率与水相中U(Ⅵ)浓度的一次方成正比,与有机相中TBP浓度的二次方成正比。在5-8MHCl浓度范围内,萃取速率随盐酸浓度的提高而迅速增加。由此可写出其萃取速率方程:

Abstract: The rate of forward extraction of U(Ⅵ) from 6Mhy-drochloric acid into tributylphosphate (TBP) in cyclohexane and backward extraction of the complex UO2C12·2TBP have been measured using the single drop technique. The rate of forward extraction is proportional to U(Ⅵ), and TBP20, while that of back extraction to UO2Cl2·2TBP0 and TBP-1 0. The apparent activation energy for the reaction has been calculated and a reaction mechanism is presented.