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盐对水+丙酸+环乙醇三相体系在298.2,303.2和308.2 K下液液相平衡的影响
作者姓名:B. Ghalami-Choobar  A. Ghanadzadeh  S. Kousarimehr
作者单位:Department of Chemistry, Faculty of Science, University of Guilan, P. O. Box:19141, Rasht, Iran
摘    要:Effects of salt and temperature on the liquid phase equilibrium of the (water + propionic acid + cyclohexanol) system were investigated. The liquid-liquid equilibrium data in the presence of KCl for various salt ionic strength of 0.5, 1.0, 1.5, 2.0, and 2.5 mol•dm3 and in absence of the salt at T (298.2, 303.2, and 308.2) K were determined. The experimental results were correlated based on the Othmer-Tobias equation and Pitzer ion-interaction model. Thermodynamic properties such as distribution coefficients and activity coefficients of propionic acid in water + cyclohexanol were determined. In addition, the separation factor, S, of the chosen solvent was obtained for the investigated system.

关 键 词:液液平衡  盐效应  环己醇  系统  酸水  丙酸  离子相互作用  热力学性质
收稿时间:2010-8-1
修稿时间:2011-4-27  

Salt Effect on the Liquid-Liquid Equilibrium of (Water + Propionic Acid + Cyclohexanol) System at T=(298.2, 303.2, and 308.2) K
B. Ghalami-Choobar,A. Ghanadzadeh,S. Kousarimehr.Salt Effect on the Liquid-Liquid Equilibrium of (Water + Propionic Acid + Cyclohexanol) System at T=(298.2, 303.2, and 308.2) K[J].Chinese Journal of Chemical Engineering,2011,19(4):565-569.
Authors:Bahram Ghalami-Choobar  Ali Ghanadzadeh  Shahram Kousarimehr
Affiliation:Department of Chemistry, Faculty of Science, University of Guilan, P. O. Box:19141, Rasht, Iran
Abstract:Effects of salt and temperature on the liquid phase equilibrium of the (water + propionic acid + cyclohexanol) system were investigated. The liquid-liquid equilibrium data in the presence of KCl for various salt ionic strength of 0.5, 1.0, 1.5, 2.0, and 2.5 mol•dm3 and in absence of the salt at T (298.2, 303.2, and 308.2) K were determined. The experimental results were correlated based on the Othmer-Tobias equation and Pitzer ion-interaction model. Thermodynamic properties such as distribution coefficients and activity coefficients of propionic acid in water + cyclohexanol were determined. In addition, the separation factor, S, of the chosen solvent was obtained for the investigated system.
Keywords:liquid-liquid equilibrium  salt effect  propionic acid  distribution coefficient
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