Phase and reaction equilibria of the acetic acid-isopropanol-isopropyl acetate-water system at 760 mmHg

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Title:	Phase and reaction equilibria of the acetic acid-isopropanol-isopropyl acetate-water system at 760 mmHg
Authors:	Lee,LS;Kuo,MZ
Contributors:	化學工程與材料工程學系
Keywords:	CLOSELY BOILING MIXTURES;VAPOR-LIQUID-EQUILIBRIA;DISTILLATION PROBLEMS;RELAXATION METHOD;CHEMICAL-REACTION;SEPARATION
Date:	1996
Issue Date:	2010-06-29 17:32:23 (UTC+8)
Publisher:	中央大學
Abstract:	An energy-saving process, the so-called reactive distillation process, is attracting more and more attention in the chemical industry. This process is based on the simultaneous implementation of chemical reaction and phase equilibria in a process unit. The esterification of acetic acid and isopropyl alcohol is one of the processes that use this technology. In order to understand the thermodynamic behavior of this mixture and its reaction products, isopropyl acetate and water, the vapor-liquid equilibrium (VLE) was measured directly with the chemical reaction considered. The esterification reaction rate of acetic acid and isopropanol mixture is very slow, In this study, para-toluenesulfonic acid was selected as the catalyst to accelerate the chemical reaction. This results in the reaction reaching equilibrium before phase equilibrium so that this complicated problem can be simplified and readily solved. The equilibrium compositions of this mixture at different temperatures were measured. The reaction equilibrium constants were calculated with the collected experimental data and the equations of reaction and phase equilibria. It was found that the reaction equilibrium constant was slightly dependent on temperature. The measured VLE data were correlated by the activity coefficient models of UNIQUAC and Wilson with consideration of the association of acetic acid in the vapor phase. The calculated results show that the correlation was successful as compared with experimental data.
Relation:	FLUID PHASE EQUILIBRIA
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] journal & Dissertation

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