二-(2-乙基己基)磷酸从盐酸介质中萃取铀(Ⅳ)的动力学研究

高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (2): 108.

二-(2-乙基己基)磷酸从盐酸介质中萃取铀(Ⅳ)的动力学研究

周祖铭, 毛家骏, 支敏, 秦启宗

复旦大学原子核科学系

收稿日期:1986-08-27 出版日期:1988-02-24 发布日期:1988-02-24

Kinetic Studies On the Extraction of Uranium(Ⅳ) from Hydrochloric Acid Solutions with HDEHP

Zhou Zuming, Mao Jiajun, Zhi Min, Qin Qizong

Department of Nuolear Science, Fudan University, Shanghai

Received:1986-08-27 Online:1988-02-24 Published:1988-02-24

摘要/Abstract

摘要： 采用上升单液滴法研完了二-(2-乙基己基)磷酸-环己烷从盐酸介质中萃取铀(Ⅳ)的动力学。测定了不同萃取条件对萃取速率的影响,提出了速率方程,并对萃取反应机理进行了讨论。

Abstract: The kineties of extraction of uranium (Ⅳ) from hydrochloric acid solutions with HDEHPin cyclohexane have been investigated using the single drop technique. The effects of the concentrations of U(Ⅳ),H⁺ and HDEHP on the extraction rate for U(Ⅳ) have been examined. It is found that the extraction rate is proportional to [U(Ⅳ)] and [(HDEHP)₂]₍₀₎^1/2 but there is no effect with hydrogen-icn concentration in the aqueous solution.The extraction rate was found to increase with the increasing temperature and the apparent activation energy is 41.7 kJ·mol^-1 between 10~40℃.It is suggested that the rate-controlling step may be the chemical reaction of U⁴⁺ with HDEHP monomer at the liquid-liquid interface.

TrendMD:

周祖铭, 毛家骏, 支敏, 秦启宗. 二-(2-乙基己基)磷酸从盐酸介质中萃取铀(Ⅳ)的动力学研究. 高等学校化学学报, 1988, 9(2): 108.

Zhou Zuming, Mao Jiajun, Zhi Min, Qin Qizong . Kinetic Studies On the Extraction of Uranium(Ⅳ) from Hydrochloric Acid Solutions with HDEHP. Chem. J. Chinese Universities, 1988, 9(2): 108.