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.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2006年第1期7-11,共5页
Journal of Chemical Engineering of Chinese Universities
关键词
汽液相平衡
醋酸异丙酯
醋酸
水
vapor-liquid equilibrium
isopropyl acetate
acetic acid
water
