中华医学超声杂志

应用化学 ›› 1991, Vol. 0 ›› Issue (6): 57-60.

• 研究论文 • 上一篇    下一篇

伯胺N1923从硫酸介质中萃取Sc(Ⅲ)的动力学研究

汤惠民, 刘慧中   

  1. 同济大学化学系, 上海 200092
  • 收稿日期:1990-04-02 修回日期:1991-01-19 出版日期:1991-12-10 发布日期:1991-12-10

KINETIC STUDY ON THE EXTRACTION OF SCANDIUM(Ⅲ)IN SULFURIC ACID SOLUTION WITH PRIMARY AMINE N1923

Tang Huimin, Liu Huizhong   

  1. Department of Chemistry, Tongji University, Shanghai 200092
  • Received:1990-04-02 Revised:1991-01-19 Published:1991-12-10 Online:1991-12-10

PDF

415

被引次数

6 | 1

摘要： 本文讨论了采用上升单液滴法研究N1923-正己烷从硫酸介质中萃取Sc(Ⅲ)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探讨。

关键词: 钪(Ⅲ), 萃取动力学, 伯胺N1923

Abstract: The extraction kinetics of Sc (Ⅲ) in sulfuric acid solution with N1923 in n-hexane hadbeen investigated using ascending single drop technique. The effects of the concentrations of Sc3+, H+, SO42, N1923 and temperature on the extraction rate have been examined. Noinfluence was found from hydrogen ion concentration in the aqueous. solution. Under lowaqueous sulfate ion concentrations, the extraction rate equation can be expressed as: R=K[Sc3+][RNHi+](i) [SO42-]2 The mechanism of extraction appears to be RNH2(i) + H(i)+—→RNH3(i)+ fast Sc(a)3+ + 2SO4(a)2- —→Sc(SO4)2(a)- equilibrium Sc(SO4)2(i)- + RNH3(i)+ ——[RNH3+][Sc(SO4)2-](i) RDS.

Key words: scandium(Ⅲ), extraction kinetics, primary amine N1923

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