Isobaric vapor–liquid equilibrium for ternary system of ethanol, ethyl propionate and para-xylene at 101.3 kPa  

作　　者：Zhongpeng Xing Yujie Gao Hui Ding Xianqin Wang Lujun Li Hang Zhou 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]Tianjin Academy of Environmental Sciences, Tianjin 300191, China [3]Tianjin Huanke Environmental Planning Technology Development Company Limited, Tianjin 300191, China [4]School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China

出　　处：《Chinese Journal of Chemical Engineering》2018年第3期560-565,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21376166)

摘　　要：Isobaric vapor–liquid equilibrium(VLE) data for the binary system ethyl propionate(2) + para-xylene(3) and ternary system ethanol(1) + ethyl propionate(2) + para-xylene(2) at atmospheric pressure(101.3 k Pa)were obtained by a VLE modified othmer still. All the experimental data passed a point to point consistency test of Van Ness method, which verified the data reliability. The Wilson and UNIQUAC activity coefficient models were employed to correlate the binary VLE data to obtain binary interaction parameters. Based on binary interaction parameters, ternary VLE data of ethanol(1) + ethyl propionate(2) + para-xylene(3) were predicted by Wilson and UNIQUAC models, which proved that predicted values are consistent with the experimental data.Furthermore, azeotropic phenomenon between ethanol and ethyl propionate disappears when the mole ratio of para-xylene and binary system of ethanol and ethyl propionate is 1:1. Therefore, this paper convinced that para-xylene is a proper extractive additive that could be used in extractive distillation to separate the binary azeotropic system of ethanol and ethyl propionate.Isobaric vapor-liquid equilibrium （VLE） data for the binary system ethyl propionate （2） ＋ para-xylene （3） and ternary system ethanol （1） ＋ ethyl propionate （2） ＋ para-xylene （2） at atmospheric pressure （101.3 kPa） were obtained by a VLE modified othmer still. All the experimental data passed a point to point consistency test of Van Ness method, which verified the data reliability. The Wilson and UNIQUAC activity coefficient models were employed to correlate the binary VLE data to obtain binary interaction parameters. Based on binary interaction parameters, ternary VLE data of ethanol （1） ＋ ethyl propionate （2） ＋ para-xylene （3） were predicted by Wilson and UNIQUAC models, which proved that predicted values are consistent with the experimental data. Furthermore, azeotropic phenomenon between ethanol and ethyl propionate disappears when the mole ratio of para-xylene and binary system of ethanol and ethyl propionate is 1：1. Therefore, this paper convinced that para-xylene is a proper extractive additive that could be used in extractive distillation to separate the binary azeotropic system of ethanol and ethyl propionate.

关 键 词：Vapor-liquid equilibrium Azeotrope Ethanol Ethyl propionate Para-xylene 

分 类 号：TQ013.1[化学工程] TQ225.24