Vapor−Liquid Equilibrium of Mixtures Containing Adipic Acid, Glutaric Acid, Dimethyl Adipate, Dimethyl Glutarate, Methanol, and Water

Abstract

Isothermal vapor−liquid equilibrium (VLE) data were measured, with a static-type apparatus, for the binary systems of methanol + dimethyl adipate, methanol + dimethyl glutarate, and dimethyl glutarate + glutaric acid at (353.15 to 453.15) K. These systems showed slightly positive deviations from the ideal solution behavior without any azeotrope formation. Additionally, the saturated pressures of dimthyl adipate, dimethyl glutarate, methanol + adipic acid, and methanol + water + adipic acid were also determined experimentally in a temperature range of (323.15 to 463.15) K. While the new binary VLE data were correlated with the NRTL-HOC and the UNIQUAC-HOC models, respectively, to determine the optimal values of the model parameters, the saturated pressure data of the ternary system were used to test the validity of the VLE prediction by using the parameters determined from solid−liquid equilibrium data.