Acta Metallurgica Sinica (English Letters) ›› 1991, Vol. 4 ›› Issue (9): 157-163.

• •    下一篇

EXTRACTION KINEIICS,MICELLIZATION AND INTERFACIAL CHARACTERISTICS OF A NEW EXTRACTANT SYSTEM

YU Jingfen JI Chen PAN Xiaomei XIONG Yigang Tsinghua University,Beijing,China   

  • 收稿日期:1991-09-11 修回日期:1991-09-11 出版日期:1991-09-11 发布日期:2009-10-10

EXTRACTION KINEIICS,MICELLIZATION AND INTERFACIAL CHARACTERISTICS OF A NEW EXTRACTANT SYSTEM

YU Jingfen JI Chen PAN Xiaomei XIONG Yigang Tsinghua University,Beijing,China   

  • Received:1991-09-11 Revised:1991-09-11 Online:1991-09-11 Published:2009-10-10

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摘要： <正> The interfacial kinetics,micellization and interfacial characteristics of the synergetic extrac-tion system,D_2EHPA-H_2RPA-Al~(3+),have been studied.H_2RPA is a single long chain alkylphosphate.We have found that H_2RPA in the mixed extractant system strongly exhibits thecharacteristics of micellization and interfacial activity.As the concentration of D_2EHPA in-creases,the micellization and interracial activity of H_2RPA decrease.The interfacialadsorption behaviour of H_2RPA is opposite to that of D_2EHPA.It was proved that the kine-tics of non-micella mixed extraction system was controlled by the chemical reaction at inter-face,and the reaction rate equation was obtained.This non-micella mixed extraction systemis expected to be used in the future.

Abstract: The interfacial kinetics,micellization and interfacial characteristics of the synergetic extrac- tion system,D_2EHPA-H_2RPA-Al~(3+),have been studied.H_2RPA is a single long chain alkyl phosphate.We have found that H_2RPA in the mixed extractant system strongly exhibits the characteristics of micellization and interfacial activity.As the concentration of D_2EHPA in- creases,the micellization and interracial activity of H_2RPA decrease.The interfacial adsorption behaviour of H_2RPA is opposite to that of D_2EHPA.It was proved that the kine- tics of non-micella mixed extraction system was controlled by the chemical reaction at inter- face,and the reaction rate equation was obtained.This non-micella mixed extraction system is expected to be used in the future.

Key words: D_2EHPA-H_2RPA-Al~(3+) extraction system, AI, micellization, interfacial kinetics