论文部分内容阅读
本文报道了二正辛基亚砜(DOSO)—二甲苯从硝酸介质中萃取铀、钚、钍和镎的实验结果。DOSO对这些元素的萃取规律类似于TBP,但分配系数(D)比TBP高,尤其是对钚。上述元素的D值均随水相HNO_3浓度增加而增加,达到最大值后下降。用斜率法测得铀、钚、镎的溶剂化数均为2,钍为3,硝酸为1。本工作对盐析剂、络合阴离子(C_2O_4~(2-)、F~-、SO_4~(2-)等)、温度等对萃取的影响以及铀、钚的反萃条件进行了研究,还计算了萃取平衡常数和铀的ΔH值。
This paper reports the experimental results of extraction of uranium, plutonium, thorium and plutonium from di-n-octyl sulfoxide (DOSO) -xylene from nitric acid medium. DOSO is similar to TBP for the extraction of these elements, but the partition coefficient (D) is higher than TBP, especially for plutonium. The D values of these elements increased with the increase of the concentration of HNO 3 in aqueous phase, and reached the maximum and then decreased. Slope method was measured uranium, plutonium, 溶 solvation number are 2, thorium 3, nitric acid 1. In this work, the effects of salting-out agent, complexing anions (C 2 O 4 2-, F 4+, SO 4 2-) and temperature on the extraction and the extraction conditions of uranium and plutonium were also studied. The equilibrium constant of extraction and the ΔH value of uranium were calculated.