二环己基-24-冠-8萃取铀的同位素效应  

THE ISOTOPE SEPARATION EFFECT OF URANIUM BY EXTRACTION WITH DICYCLOHEXYL-24-CROWN-8

作　　者：韩延德[1] 罗文宗 高淑琴[1] 郭锦勇[2] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]核工业北京化工冶金研究院,101149

出　　处：《核化学与放射化学》1993年第1期56-60,共5页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金

摘　　要：研究了二环己基-24-冠-8在1,2-二氯乙烷中萃取铀的同位素效应,测定了^(235)U/^(238)U同位素的单级分离因子,进一步证实了在铀的不变价态同位素分离体系中,冠醚体系具有比其它体系大得多的同位素效应。The isotope separation effect of uranium by extraction with dicyclohexyl-24-crown-8(DCH24C8) has been studied. The single stage separation factor (α) is determined in the isotope exchange systems,in which uranyl chloride is extracted by DCH24C8 involving no change of uranium valency. By means of a stepwise enriching and depleting cascade process,the values of a are found to be 1. 00061±0. 00009 and 1. 00066±0. 00019,respectively,for the initial U(Ⅵ) concentration of 0. 31 mol/1 in the aqueous phase at 27℃. The lighter isotope 235U is found to accumulate preferentially in the organic phase containing uranyl polyether complex.

关 键 词：冠醚 铀 同位素分离 萃取 

分 类 号：O614.62[理学—无机化学]