文献类型：期刊文献

中文题名：萃取杂质法精制对氨基苯酚

英文题名：Separation of by-Products in p-Aminophenol by Solvent Extraction with Nitrobenzene

作者：张秋香[1];陈同芸[1];张平[1];李倩英[1]

机构：[1]华东理工大学化学工程系

年份：1995

卷号：21

期号：6

起止页码：665

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：1998014016514);Scopus;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：对氨基苯酚;硝基苯;精馏;萃取杂质法;苯胺

外文关键词：p-aminodiphenol;extraction;nitrobenzene; rectification;4,4 ′- diaminodiphe-nylether:aniline

摘要：以硝基苯（ＮＢ）为萃取剂，考察了文题的影响因素，确定了萃取过程的最佳工艺条件：萃取温度１０～６０℃；初始水相的ｐＨ值４．３～５．５。负载有机相中的苯胺可用精馏方法回收，其纯度大于９９．５％。依实验确定的萃取平衡等温线，可得到萃取的理论级数为５级。ＮＢ萃取关键杂质精制对氨基苯酚为一吸热反应，萃取反应的热效应为２．２６ｋＪ／ｍｏｌ。
The extraction of by-products in p-aminophenol using nitrobenzene as solvent hasbeen studied. Process variables influeneing the distribution coefficient of by-products are studiedexperimentally. The optimun extraction conditions are as follows:pH=4.3～5. 5 and T = 40～60℃. Aniline in loaded organic phase can be recovered by rectification and the purity ls over99.5%. Theoretlcal stage numbers of extraction are 5 according to isotherms、which are attainedby experiments. The enthalpy change in complex extraction reaction is 2.26kJ/mol.