Isobaric vapour-liquid equilibria of binary 1-propoxy-2-propanol mixtures with water and alcohols at reduced pressure

被引:27
|
作者
Ramsauer, B. [1 ]
Neueder, R. [1 ]
Kunz, W. [1 ]
机构
[1] Univ Regensburg, Inst Phys & Theoret Chem, Dept Chem & Pharm, D-93053 Regensburg, Germany
关键词
Vapour pressure; 1-Propoxy-2-propanol; VLE; Correlation; COSMO-RS;
D O I
10.1016/j.fluid.2008.06.022
中图分类号
O414.1 [热力学];
学科分类号
摘要
A dynamic recirculation apparatus has been used to determine the isobaric phase equilibria of binary 1-propoxy-2-propanol mixtures with water and different alcohols (methanol, ethanol, 2-butanol and 1 hexanol). The systems exhibit both positive and negative deviations from Raoult's law. No azeotropic mixture is found in any of the systems under investigation. The binary diagram of water/1-propoxy-2-propanol (PnP) shows the well-known liquid-liquid-separation. The experimental results are correlated with the Wilson, NRTL and UNIQUAC model and also compared to the COSMO-RS predictive model and the modified UNIFAC group-contribution method. Additionally, the vapour pressure of PnP has been determined experimentally up to 140 degrees C as prerequisite for modelling of the data. (c) 2008 Elsevier B.V. All rights reserved.
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页码:84 / 92
页数:9
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