高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (2): 224.

• 论文 • 上一篇    下一篇

有机磷酸混合萃取体系的界面化学及动力学控制机制研究

於静芬, 吉晨   

  1. 清华大学化工系, 北京, 100084
  • 收稿日期:1991-01-31 出版日期:1992-02-24 发布日期:1992-02-24
  • 通讯作者: 於静芬
  • 基金资助:

    国家自然科学基金

Interfacial Chemistry and Kinetics-Controlled Reaction Mechanism of Organo-Phosphoric Acid Mixed Extraction Systems

YU Jing-fen, JI Chen   

  1. Department of Chemical Engineering, Tsinghua University, Beijing, 100084
  • Received:1991-01-31 Online:1992-02-24 Published:1992-02-24

PDF (PC)

被引次数

61

摘要： 研究了D2EHPA(二(2-乙基己基)磷酸)-M1PA、M2PA(长碳链单烷基磷酸酯)-Al3+和D2EHPA-MEHPA(单(2-乙基己基)磷酸)-Al3+混合萃取体系的界面化学和动力学。结果表明,混合体系界面活性下降,D2EHPA-M1PA萃取Al3+的过程为扩散和化学反应共同控制机制。

关键词: 萃取动力学, Al, 界面活性, 胶团化作用

Abstract: The interfacial chemistry for D2EHPA(Di(2-ethyl-hexyl) phosphoric acid)-M1PAor M2PA(two monophosphoric acid extractants with a long-chain)-Al3+ and D2EHPA-MEHPA (mono(2-cthyl hexyl)phosphoric acid)-Al3+ mixed extraction systems was studiedIt was found that, compared with individual extraction system alone, the mixed extraction systems show a particular advantage improvement in the interfacial characteristics of the systemsThe extraction kinetics and interfacial chemistry study indiate that the process of aluminium extraction by micella mixed extraction system(D2EHPA-M1PA) is controlled by the chemical reaction in combination with diffusion, while the controlling reaction occurred inside the micella phase.

Key words: Extraction kinetics, Aluminum, Interfacial activity, Micellization

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