醋酸异丙酯-醋酸-水体系汽液相平衡研究  

Vapor-Liquid Equilibria of Isopropyl Acetate-Acetic Acid-Water System

作　　者：李新利[1] 畅伟贤[1] 万辉[1] 管国锋[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《高校化学工程学报》2006年第1期7-11,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：用改进的Rose釜测定了101.33kPa下醋酸异丙酯-醋酸、醋酸异丙酯-醋酸-水(互溶区内)的等压汽液相平衡数据。考虑了醋酸在汽相中的缔合效应和非理想性,用NRTL、UNIQUAC模型对醋酸异丙酯-醋酸体系汽液相平衡数据进行关联,得到了相应的模型参数。在三元汽液相平衡数据的预测过程中详细讨论了醋酸-水体系汽液平衡数据对预测结果的影响,获得了较优的预测结果。Isobaric vapor-liquid equilibrium （VLE） data for isopropyl acetate-acetic acid and isopropyl acetate-acetic acid-water systems were measured at 101.33 kPa by using an improved Rose equilibria cell. The fugacity coefficients of components in the vapor phase were calculated by Hayden-O＇connell method. The binary interaction parameters used to determine the liquid phase activity coefficients and expressed by the UN/QUAC and NRTL models, were got by applying the nonlinear least square method. For acetic acid-water system, 8 groups of NRTL interaction parameters obtained by fitting the published VLE data were respectively used to predict the VLE data of the isopropyl acetate-acetic acid-water system. Among them only three groups＇ prediction results are satisfactory and their average absolute deviations in temperature are less than 1.23 ℃. From the prediction results, it can be concluded that VLE data of acetic acid-water system have great influence upon the prediction of the VLE data of ternary system involving acetic acid and water and should be strictly selected.

关 键 词：汽液相平衡 醋酸异丙酯 醋酸 水 

分 类 号：O642.42[理学—物理化学]