N－正辛基己内酰胺从硝酸介质中萃取铀（Ⅵ）的动力学研究

Extraction Kinetics of Uranium (Ⅵ) from Nitric Acid Medium by N-Octylcaprolactam

采用上升单液滴往研究了Ｎ－正辛基己内酰胺从硝酸介质中萃取铀（Ⅵ）的动力学。得出Ｕ（Ⅵ）的萃取速率与水相中铀浓度的１次方成正比，与温度（１０～４５℃）无关；萃合物向有机相的扩散为萃取过程的速控步骤。

The kinetics of extraction of uranium(Ⅵ)from nitric acid medium by N-octyl-caprolactam(OCLA) in kerosene has been investigated by single drop technique. The extrac-tion rate was found to be of pseudo-first order with respect to the concentration of uranium(Ⅵ)and independent of the extraction temperature. It is suggested that the extraction rateof uranium(Ⅵ)is controlled by the diffusion of UO_2(NO_3)_2·2OCLA from interface intoorganic phase.