中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (6): 76-79.

• 研究论文 • 上一篇    下一篇

P350从硝酸介质中萃取Nd(Ⅲ)的动力学研究

孙都成1, 古丽1, 李德谦2   

  1. 1. 新疆大学化学系 乌鲁木齐;
    2. 中国科学院长春应用化学研究所稀土化学与物理开放实验室 130022 长春
  • 收稿日期:1992-12-22 修回日期:1993-04-26 出版日期:1993-12-10 发布日期:1993-12-10
  • 基金资助:
    国家自然科学基金资助课题

KINETIC STUDY ON THE EXTRACTION OF NEODYMIUM BY P350 IN NITRIC ACID SOLUTION

Sun Ducheng1, Gu Li1, Li Deqian2   

  1. 1. Department of Chemistry, Xingjiang University, Urumqi;
    2. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-12-22 Revised:1993-04-26 Published:1993-12-10 Online:1993-12-10

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摘要： 本文采用恒界面池法研究了诸因素对甲基磷酸二甲庚酯(P350)从硝酸体系中萃取Nd(Ⅲ)动力学的影响,求得反应的表观活化能为11.8kJ/mol,从实验结果推论出萃取过程为界面化学反应的控制机理,得出萃取反应速率方程,并提出中性磷氧萃取剂在萃取金属离子过程中可能存在阳离子交换反应机理。

关键词: 钕(Ⅲ), 萃取, 动力学, 甲基膦酸二甲庚酯

Abstract: The kinetics of the extraction of Nd(Ⅲ) by di-(1-methyl heptyl)methyl phosphonate (P350) in nitric acid solution has been studied by using the constant-interface cell technique. The effects of the stirring speed,interfacial area between two phases,temperature,and concentration of P350,NO3-,amd H+ on the extraction rate have been examined. The apparent activation energy was found to be 11.8kJ/mol. The experimental results showed that the rate-controlling step may be the chemical reaction at the interface. A cation exchange mechanism has been proposed.

Key words: di-(1-methyl heptyl)methyl phosphonate, neodymium, kinetics, extraction

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