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

AbstractVapour 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. GE, HE, and VE, 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.