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一、前言由于U(IV)-U(VI)同位素交换体系具有相当大的同位素效应和很好的稳定性,并且容易实现两相回流,这对于分离U同位素的工业应用都是十分有利的。但是,U(IV)-U(VI)同位素交换反应速度非常慢,常温下H~+浓度为1.0—4.0 mol/l时,速度常数为1.0×10~(-4)l~2/mol·s。因此要用U(IV)-U(VI)交换体系浓缩铀同位素,必须研究U(IV)-U(VI)交换反应动力学,找到加快交换反应的方法。
I. INTRODUCTION Due to the considerable isotopic effect and good stability of U (IV) -U (VI) isotope exchange system and the easy two-phase reflow, it is very beneficial for industrial applications to separate U isotopes. However, the isotopic exchange reaction of U (IV) -U (VI) is very slow, with a velocity constant of 1.0 × 10 -4 mol / L at H ~ + concentration of 1.0-4.0 mol / L at room temperature s. Therefore, U (IV) -U (VI) exchange system to enrich uranium isotopes, U (IV) -U (VI) exchange reaction kinetics must be studied to find ways to accelerate the exchange reaction.