U(Ⅲ)-U(Ⅳ)同位素交换过程的同位素效应

THE ISOTOPIC EFFET OF THE U(Ⅲ)-U(Ⅳ) ISOTOPIC EXCHANGE PROCESS

摘要: 本文研究了U(Ⅲ)-U(Ⅳ)在7.0mol/l HCl介质中及在U(Ⅲ)-7.0mol/l HCI-U(Ⅳ)-50％TBP-煤油和U(Ⅲ)-7.0mol/l HCl-U(Ⅳ)-50％TBP-二甲苯体系中的同位素交换过程,测得上述体系的单级分离因数分别为1.0026,1.0031和1.0030,从而证实了P.Delvalle的1.0025-1.0030的实验结果;确认了用液态Zn-Hg齐制备U(Ⅲ)是快速、有效的方法;初步探索了用U(Ⅲ)-U(Ⅳ)交换过程浓缩~(235)U的合适体系。

Abstract: The U(33333333)-U(Ⅳ) isotopic exchange process in.7.0 mol/1 HC1 aqueous solution and in U(Ⅲ)-7. 0mol/1 HC1-U(Ⅳ)-50% TBP-kerosene and U(Ⅲ)-7. 0mol/1 HCl-U(Ⅳ) -50% TBP-xylene systems is found to give single stage separation factors of 1.0026, 1.0031 and 1.0030 respectively. These results agree quite well with P.Delvalle's experimental values(l. 0025-1. 0030) . Based on this study, the exchange systems using TBP-xylene and DiABP-xylene as extractant have been selected for further study for the enrichment of 235U.