Vapour Pressures at Eight Temperatures of Mixtures of Di-n-Propylether + Ethanol, or +1-Butanol – Thermodynamic Description of Mixtures of Di-n-Propylether + Alkanol According to the ERAS Model

Abstract

Vapour pressures of di-n-propylether with ethanol and with 1-butanol were measured at eight temperatures between 278.15 and 323.15 K by a static method. Reduction of the vapour pressures to obtain activity coefficients and excess molar Gibbs free energies was carried out by Barker's method. Mixtures containing ethanol show azeotropy with a minimum boiling temperature. G^E, H^E, and V^E, at 298.15 K, of mixtures of di-n-propylether + methanol, + ethanol, + 1-propanol, + 2-propanol, and + 1-butanol are compared with predictions of the ERAS model observing that the model reproduces acceptably the experimental behaviour.