中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (5): 64-67.

• 研究论文 • 上一篇    下一篇

N－正辛基己内酰胺从硝酸介质中萃取铀(Ⅵ)的动力学研究

沈朝洪1, 竺建康1, 包伯荣1, 周祖铭2, 曹正白3   

  1. 1. 中国科学院上海原子核研究所 上海 201800;
    2. 复旦大学物理二系 上海;
    3. 苏州大学化学系苏州 苏州
  • 收稿日期:1993-12-15 修回日期:1994-06-06 出版日期:1994-10-10 发布日期:1994-10-10

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

Shen Chaohong1, Zhu Jiankang1, Bao Borong1, Zhou Zuming2, Cao Zhengbai3   

  1. 1. Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800;
    2. Department of Physics Ⅱ, Fudan University, Shanghai;
    3. Suzhou University, Suzhou
  • Received:1993-12-15 Revised:1994-06-06 Published:1994-10-10 Online:1994-10-10

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摘要： 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。

关键词: 铀, N－正辛基己内酰胺, 萃取动力学

Abstract: 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 extraction 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 rate of uranium (Ⅵ) is controlled by the diffusion of UO2(NO3)2·2OCLA from interface into organic phase.

Key words: uranium, N-octylcaprolactam, extraction kinetics

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