[反应萃取分离对氨基苯甲酸和对羟基苯甲酸的比较研究]

[Comparative study on separation of p-aminobenzoic and p-hydroxy-benzoic acids by reactive extraction].

作者信息

Galaction Anca-Irina, Caşcaval D

机构信息

Facultatea de Bioinginerie Medicală, Catedra de Tehnologie Protetich si Biotehnologii, Universitatea de Medicina si Farmacie Gr.T. Popa Iaşi.

出版信息

Rev Med Chir Soc Med Nat Iasi. 2008 Oct-Dec;112(4):1110-4.

PMID:20209796

Abstract

The comparative study on reactive extraction of p-aminobenzoic and p-hydroxybenzoic acid with Amberlite LA-2 and D2EHPA in two solvents with different polarity (n-heptane and dichloromethane) indicated that the nature of the specific substituents, extractant type and solvent polarity control the extraction mechanism. Although the reactive extraction with Amberlite LA-2 of the two acids occurs by means of rather similar interfacial reactions, the extraction with D2EHPA is based on different mechanisms, due to the participation of the two different substituents of aminic and phenolic type. In all cases, the most efficient extractions have been reached for the combination Amberlite LA-2-dichloromethane.

摘要

采用Amberlite LA - 2和二 (2 - 乙基己基) 磷酸 (D2EHPA) 在两种不同极性的溶剂（正庚烷和二氯甲烷）中对对氨基苯甲酸和对羟基苯甲酸进行反应萃取的对比研究表明，特定取代基的性质、萃取剂类型和溶剂极性控制着萃取机理。尽管用Amberlite LA - 2对这两种酸进行反应萃取是通过相当相似的界面反应发生的，但由于氨基型和酚型两种不同取代基的参与，用D2EHPA进行的萃取基于不同的机理。在所有情况下，Amberlite LA - 2 - 二氯甲烷的组合实现了最有效的萃取。