中华医学超声杂志

应用化学 ›› 1990, Vol. 0 ›› Issue (3): 1-5.

• 研究论文 •    下一篇

HEH[EHP]从H2SO4介质中萃取Er(Ⅲ)的动力学和机理

乐善堂, 李德谦   

  1. 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 长春 130022
  • 收稿日期:1989-06-22 修回日期:1989-10-23 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

KINETICS AND MECHANISM OF EXTRACTION OF ERBIUM(Ⅲ)FROM SULPHURIC ACID SOLUTIONS WITH HEH[EHP]

Yue Santang, Li Deqian   

  1. Laboratory of Rare Earth Chemistry and Physics of Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-06-22 Revised:1989-10-23 Published:1990-06-10 Online:1990-06-10

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摘要： 本文采用充分混合法研究了HEH〔EHP〕-正庚烷从H2SO4介质中萃取Er(Ⅲ)的动力学,考察了水相酸度、硫酸根离子浓度和萃取剂浓度对萃取速率的影响,提出了萃取速率方程,并讨论了萃取机理。

关键词: 铒, HEH[EHP], 萃取机理, 动力学

Abstract: The kinetics of extraction erhium(Ⅲ)from sulphurib acid solutions with HEHl[EHP]in n-heptane has been investigated. The effects of the concentrations of Er3+,H+,SO42-,and HEH[EHP]on the extraction rate for Er(Ⅲ)have been observed. It is found that therate of forward extraction reaction is proportional to [Er3+], [H+]-2.25,[SO42-]0.26 and[H2A2](o)1.69,white the rate of backward extraction reaction is proportional to [Er(Ⅲ)](o),[H+]1.05and [H2A2](o)-1.08.The rate-determining step is suggested to be the chemical reactionof ErA2 with HA at the interface for forward extraction and H+ with ErA3(o) at the inter-face for backward extraction.

Key words: erbium, HEH[EHP], extraction, kinetics

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