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.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
1995年第6期665-669,共5页
Journal of East China University of Science and Technology
关键词
对氨基苯酚
硝基苯
精馏
萃取杂质法
苯胺
p-aminodiphenol
extraction
nitrobenzene
rectification
4,4 ′- diaminodiphe-nylether:aniline
