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

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

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- MECHANISM OF EXTRACTION FOR CARBOXYLIC ACID WITH TRI-N-OCTYLAMINE(Ⅱ)──EFFECTS OF pK_a AND HYDROPHOBICITY
- CIESC Journal Issue 3, (1998)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q028
- Online First：25 June 1998，
  
  Published：25 June 1998
- 稿件说明：
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Wen Mei, Yang Yiyan, Dai Youyuan, et al. MECHANISM OF EXTRACTION FOR CARBOXYLIC ACID WITH TRI-N-OCTYLAMINE(Ⅱ)──EFFECTS OF pK_a AND HYDROPHOBICITY[J]. CIESC Journal, 1998, (3).
DOI：

Wen Mei, Yang Yiyan, Dai Youyuan, et al. MECHANISM OF EXTRACTION FOR CARBOXYLIC ACID WITH TRI-N-OCTYLAMINE(Ⅱ)──EFFECTS OF pK_a AND HYDROPHOBICITY[J]. CIESC Journal, 1998, (3). DOI：

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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