EXTRACTION OF MALEIC ACID BY REVERSIBLE CHEMICAL COMPLEXATION(Ⅰ) EXTRACTION EQUILIBRIUM

LI Zhenyu; QIN Wei; LI Fei; DAI Youyuan

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EXTRACTION OF MALEIC ACID BY REVERSIBLE CHEMICAL COMPLEXATION(Ⅰ) EXTRACTION EQUILIBRIUM

更新时间：2025-12-10

- EXTRACTION OF MALEIC ACID BY REVERSIBLE CHEMICAL COMPLEXATION(Ⅰ) EXTRACTION EQUILIBRIUM
- CIESC Journal Issue 7, (2002)
- 作者机构：
  
  清华大学化学工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 July 2002，
  
  Published：25 July 2002
- 稿件说明：
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LI Zhenyu, QIN Wei, LI Fei, et al. EXTRACTION OF MALEIC ACID BY REVERSIBLE CHEMICAL COMPLEXATION(Ⅰ) EXTRACTION EQUILIBRIUM[J]. CIESC Journal, 2002, (7).
DOI：

LI Zhenyu, QIN Wei, LI Fei, et al. EXTRACTION OF MALEIC ACID BY REVERSIBLE CHEMICAL COMPLEXATION(Ⅰ) EXTRACTION EQUILIBRIUM[J]. CIESC Journal, 2002, (7). DOI：

摘要

以三辛胺 (TOA)为萃取剂

正辛醇、甲基异丁基酮 (MIBK)、正己烷和氯仿为稀释剂开展了萃取平衡特性及负载溶剂红外光谱结构分析的实验研究 .结果表明

稀释剂对萃取的影响与马来酸和萃取剂的浓度有关 .对于 4种稀释剂体系

当平衡水相酸浓度较低时

萃取马来酸的次序为质子化稀释剂大于一般极性的稀释剂 ;反之

萃取马来酸的次序为 :MIBK >正辛醇 >正己烷 >氯仿 .TOA在平衡水相酸浓度较低时能提供较大的萃取分配系数

萃取剂化学计量饱和后存在“过载”现象

大小次序为MIBK >正辛醇 >正己烷 >氯仿 .负载溶剂的红外光谱分析表明

马来酸作为二元有机酸

与TOA只存在一盐的萃合物形式

有机相中不存在马来酸的聚集体

可以认为只有 1∶1型酸胺萃合物

Abstract

The extraction process based on chemical complexation is of higher capacities and selectivities for dilute polar organic solution.In this work

phase equilibrium governing the reactive extraction of maleic acid from aqueous solution into solutions of TOA in the diluents chloroform

4-methyl-2-pentanone (MIBK)

n -hexane and n -octanol was investigated.The results showed that the influence of the diluents on extraction depended on the concentration of maleic acid.Protonation diluent was more effective than others in low equilibrium concentration of maleic acid.In high equilibrium concentration of maleic acid

the sequence of extraction capacity was MIBK> n -octanol> n -hexane>chloroform.Overloading existed and the sequence was MIBK> n -octanol> n -hexane>chloroform.FT-IR spectroscopic analysis of organic samples loaded with maleic acid was carried out

the results showed that amine formed 1∶1 complexation with maleic acid.

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