石油亚砜在不同稀释剂中萃取铀(Ⅵ)的研究

STUDIES ON EXTRACTION OF URANIUM(Ⅵ) WITH PETROLEUM SULFOXIDES

研究了在不同稀释剂中石油亚砜(PSO)对铀()的萃取。其萃取能力在不同稀释剂中由强到弱的顺序为:苯、甲苯、环己烷、正庚烷、煤油、四氯化碳、氯仿。求出了萃取反应的各热力学函数变化值。建立了萃取平衡常数与稀释剂物理参数间的经验方程。考察了硝酸浓度、盐析剂浓度、配位阴离子浓度对萃取平衡的影响,并用红外光谱对萃取机理进行了研究。

The extraction of uranium(Ⅵ) with petroleum sulfoxides(PSO) in different diluents is studied. The extraction ability of U(Ⅵ) decreases in the following order: benzene, toluent, cyclohexane, heptane, kerosene, carbon tetrachloride and chloroform. The influence of the concentrations of nitric acid, PSO, saltingout agent, complexing anion and temperature on the extraction equilibrium is also investigated, and the enthalpy of the extraction reaction is obtained. The relationship between the extraction equilibrium constants K ex and the physical parameters of diluents is derived. The extraction mechanism and equilibrium are examined by measurement of IR spectrophotometry.