中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (1): 61-64.

• 研究论文 • 上一篇    下一篇

磷酸三丁酯从硝酸介质中萃取铀(Ⅵ)的动力学研究

余绍宁, 周祖铭, 龚健, 卞麦英   

  1. 复旦大学物理二系 上海 200433
  • 收稿日期:1991-02-06 修回日期:1991-05-31 出版日期:1992-02-10 发布日期:1992-02-10

KINETIC STUDIES ON THE SOLVENT EXTRACTION OF URANIUM (Ⅵ) FROM NITRIC ACID SOLUTION WITH TRIBUTYL PHOSPHATE

Yu Shaoning, Zhou Zuming, Gong Jian, Bian Maiying   

  1. Department of Physics Ⅱ, Fudan University, Shanghai 200433
  • Received:1991-02-06 Revised:1991-05-31 Published:1992-02-10 Online:1992-02-10

PDF

467

被引次数

22 | 4

摘要： 用上升单液滴法和恒界面池法研究了磷酸三丁酯-环己烷从硝酸介质中萃取铀(Ⅵ)的动力学。萃取过程为扩散控制,得到了在扩散控制下影响萃取速率的一些规律。

关键词: 铀, 硝酸, 萃取动力学, 磷酸三丁酯

Abstract: The kinetics of extraction of uranium (Ⅵ) from nitric acid solution by tributyl phophate (TBP) in cyclohexane was investigated using single drop and Lewis cell technique.The extraction rate were found to be pseudo-first order with respect to the concentration of uranium (Ⅵ). It was increased with increasing concentration of TBP between 0～0.5 mol/L TBP and had a max/mum at about 4 mol/L nitric acid or nitrate in aqueous solution. The rate was almost independent of the extraction temperature. It is suggested that the extraction rate of uranium(Ⅵ) is controlled by the diffusion of complex UO2(NO2)3·2TBP from interface into organic phase.

Key words: uranium, nitric acid, extraction, kinetics, tributyl phosphate

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