Liquid−Liquid Equilibrium and Excess Enthalpies in Binary Systems Methylcyclohexane + Methanol and Methylcyclohexane + N,N-Dimethylformamide

Liquid−liquid equilibrium and excess enthalpies were studied for the two binary systems:  methylcyclohexane + methanol and methylcyclohexane + N,N-dimethylformamide. Points of the binodal curve in the vicinity of the critical point were established in both of the systems by means of the cloud-point...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2003-01, Vol.48 (1), p.152-157
Main Authors: BENDOVA, Magdalena, REHAK, Karel, MATOUS, Jaroslav, NOVAK, Josef P
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Liquid-liquid equilibria
Phase equilibria
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Summary:Liquid−liquid equilibrium and excess enthalpies were studied for the two binary systems:  methylcyclohexane + methanol and methylcyclohexane + N,N-dimethylformamide. Points of the binodal curve in the vicinity of the critical point were established in both of the systems by means of the cloud-point method. Equilibrium compositions were determined at different temperatures using the direct analytical method and the volume method. Excess enthalpies as functions of composition were determined at 298.15 K and 313.15 K using a Hart 4410 microcalorimeter with continuous-flow mixing cells. The results were correlated by the modified Wilson equation. A prediction of the liquid−liquid equilibrium and the excess enthalpy by the modified UNIFAC contribution method (Dortmund) was compared to the experimental values.
ISSN:0021-9568
1520-5134
DOI:10.1021/je020135f