(222g) Vapor-Liquid Equilibrium of the 3-Methyl-1-Butanol + 3-Methyl-1-Butyl Propionate and Propionic Acid + 3-Methyl-1-Butyl Propionate Systems At 50.00, 101.33 and 150.00 Kpa

This work helps to construct a complete phase-equilibrium representation of the isoamyl alcohol - propionic acid esterification system, with the presentation of  data not reported in the open literature. The data were correlated with phase equilibrium models that can be used for further studies on distillation-based separation processes for the reactive mixtures of isoamyl alcohol with propionic acid. Specifically, the isobaric vapor-liquid equilibrium for the binary systems 3-methyl-1-butanol + 3-methyl-1-butyl propionate, and propionic acid + 3-methyl-1-butyl propionate at three different pressures is reported. Measurements were done in a dynamic equilibrium cell (Fischer Labodest VLE 602) at 50.00, 101.33 and 150.00 kPa. The experimental data were tested for thermodynamic consistency (TC) with point, total area and infinite dilution tests, using the Hayden-O’Connell equation-of-state for the calculation of vapor fugacity coefficients and the Dortmund UNIFAC-modified group contribution method for the prediction of excess enthalpies. The approving criteria for the use of the point, total area and infinite dilution TC tests presented by Kurihara et al (Fluid Phase Equilib. 219, 2004, 75-85.), together with the evaluation and regression utilities available in the software Aspen Propierties ® 7.3, were used. VLE data were correlated using the NRTL activity model for each pressure and for all pressure range.