CIESC Journal

• 化工学报 • 上一篇    下一篇

三辛胺萃取有机羧酸的机理(Ⅱ)──有机羧酸的pK_a值和亲油性的影响

文梅,杨义燕,戴猷元,汪家鼎   

  1. 清华大学化学工程系!北京100084,清华大学化学工程系!北京100084,清华大学化学工程系!北京100084,清华大学化学工程系!北京100084
  • 出版日期:1998-06-25 发布日期:1998-06-25

MECHANISM OF EXTRACTION FOR CARBOXYLIC ACID WITH TRI-N-OCTYLAMINE(Ⅱ)──EFFECTS OF pK_a AND HYDROPHOBICITY

Wen Mei;Yang Yiyan;Dai Youyuan;Wang Jiading(Department of Chemical Engineering,Tsinghua University,Beijing 100084)   

  • Online:1998-06-25 Published:1998-06-25

摘要: 在本文(Ⅰ)报研究的基础上,进一步考察了三辛胺──有机羧酸体系的红外光谱图.选用的有机羧酸为甲酸、丁酸、己酸和氯乙酸等.通过红外光谱分析定量求取了负载羧酸有机相的I值,讨论了有机羧酸的pK_a值和亲油性对不同形态萃合物组成比的影响.

Abstract: In this work,the organic phase samples loaded with carboxylic acid were studied by FT-IR spectroscopy.Thi-n-octylamine(TOA)was used as a complexing agent.The carboxylic acids used are formic acid,butyric acid,hexanoic acid and chloroacetic acid.The fraction of ion──pair extent and hydrogen──bonded extent in the systems were determined quantitatively.The effects of pK_a and hydrophobicity of carboxylic acids on the fraction were determined.The lower the pK_a of carboxylic acid and the higher its hydrophbicity,the higher the fraction of ion-pair extent would be.

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