在含有催化剂Fe~(2+)的高浓度盐酸介质中U(Ⅳ)-U(Ⅵ)电子交换过程的同位素效应

THE ISOTOPIC EFFECT OF THE U(Ⅳ)-U(Ⅵ) ELEC-TRONIC EXCHANGE REACTION IN HYDROCHLO-RIC ACID SOLUTION OF HIGH CONCENTRATION CONTAINING CATALYSTS

摘要: <正> 低浓缩铀是核电站动力堆的燃料。但是因目前生产低浓铀的扩散法和离心法的能耗或设备费用过高,而影响了核电的经济效益。因此,人们试图找到一种更廉价地生产低浓铀的方法。近十几年来,人们发现U(Ⅳ)-U(Ⅵ)和U(Ⅲ)-U(Ⅳ)电子交换反应具有相当大的同位素效应,并已投入相当多的人力进行了基础研究和应用研究。与此同时也发现大环化合物与其它元素生成的配位化合物比通常的配体交换反应的同位索效应大得多,对于铀,可望找到合适的、具有较大同位素效应的大环化合物。

Abstract: The isotopic effect of the U(Ⅳ)-U(Ⅵ) electronic exchange reaction is measured in hydrochloric acid solution of high concentration by means of equilibration in batch. This value equals 1.0014±0.0003 and is in agreement with Woodward's and Hutchison's results which are measured in hydrochloric acid of low concentration. When using the catalyst Fe2+ for accelerating U(Ⅳ)-U(Ⅵ) electronic exchange reaction, the equilibrium time decreases remarkably.