1,4-丁二醇-二乙二醇二元物系真空下气液平衡研究  

Study on Isobaric Vapor-Liquid Equilibrium for the Binary System 1,4-Butylene glycol-Diethylene Glycol under Vacuum

作　　者：陈卫航[1] 李清亚[1] 蒋元力[2] 孙书培[1] 张晓明[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]河南煤化集团,河南郑州450046

出　　处：《郑州大学学报（工学版）》2014年第5期120-123,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省重大科技专项资助项目(豫科计【2011】6号)

摘　　要：煤制乙二醇过程中产生的副产物1,4-丁二醇和二乙二醇对获得高纯度的乙二醇有着重要影响.采用真空精馏方法分离提纯设计计算时,需要1,4-丁二醇和二乙二醇气液平衡数据.为此在6.67kPa压力下测定了1,4-丁二醇—二乙二醇的气液相平衡数据,并进行了热力学一致性检验,结果表明实验数据符合热力学一致性.分别用WILSON和NRTL模型对实验数据进行关联,发现两个模型误差都不大,均可满足工程设计的需要.Large amount of byproducts （1,4-Butylene glycol and Diethylene glycol） are generated in the process of coal glycol.The basic data were inadequate for separation and purification process design.We used only vapor phase circulation method to measure vapor-liquid equilibrium values of 1,4-Butylene glycol and Diethylene glycol at 6.67KPa.Thermodynamic consistency test was conducted with area test method,and the experimental data of the binary system measured in our work passed the test.WILSON and NRTL activity coefficient models were respectively applied to correlate the experimental data.The results showed that these two models both had very small deviation from the experimental results,which can meet the separation requirements of the process.

关 键 词：气液平衡 1 4-丁二醇 二乙二醇 WILSON模型 NRTL模型 

分 类 号：TQ013.1[化学工程] O642.42[理学—物理化学]