Vapor-liquid equilibria (VLE) of isopropyl alcohol-toluene-water system in the presence of magnesium chloride

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Conference Proceeding

Publication Date

2009

Physical Description

6 leaves

Abstract

The vapor-liquid equilibrium (VLE) of isopropyl alcohol-toluene-water-magnesium chloride system was investigated in this study. Mixtures of different volume ratios of toluene, isopropyl alcohol and water containing different concentrations of magnesium, chloride were prepared. The prepared solutions were then distilled using an ebulliometer to generate the VLE data. Results revealed that increasing the MgCl₂ concentration decrease appreciably the mole fraction of water in the vapor phase. The behavior can be attributed to the ion-solvent interaction. Since the particles of the dissolved salt tend to attract preferentially one type of solvent molecules than the others, increasing the dissolved salt concentration increases the ion-solvent interactions. The relative volatility was observed between the system with no salt and with 0.2 m MgCl₂. However, at 1.0 m MgCl₂, the mixed-solvent system exhibited a significant increase in relative volatility. The enhancement factors were calculated and the values increased strongly with increasing MgCl₂ concentration attaining values as high as 6.5. the degree of enhancement was found to be more pronounced at higher concentration of IPA and at higher concentration of MgCl₂ in the feed. The experimental VLE were compared with those obtained from the UNIQUAC model for the system without salt and the extended UNIQUAC model for the system with MgCl₂. The calculated VLE are generally in good agreement with the experimental

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Disciplines

Chemical Engineering

Note

Paper presented at the 16th ASEAN Regional Symposium on Chemical Engineering, Manila, Philippines, December 1-2, 2009

Keywords

ASEAN Regional Symposium on Chemical Engineering (16th : 2009 : Manila; Philippines)

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