Density and Viscosity of 2-Butanol + (1-Propanol, 2-Propanol, or 3-Amino-1-propanol) Mixtures at Temperatures of (293.15 to 323.15) K: Application of the ERAS Model

Abstract

In this work, the density, ρ, and viscosity, η, of pure components 1-propanol, 2-propanol, 3-amino-1-propanol, and 2-butanol along with binary mixtures of {x12-butanol + x21-propanol}, {x12-butanol + x22-propanol}, and {x12-butanol + x23-amino-1-propanol} were determined over the entire composition range at temperatures of (293.15 to 323.15) K. The experimental data of density and viscosity were used to calculate the excess molar volumes, VmE, and viscosity deviations, Δη, of the mixtures. The obtained results show that the VmE values of the mixtures are negative over the whole composition range and increase with increasing temperature. Viscosity deviations of the {x12-butanol + x21-propanol} mixture are negative at low temperatures and positive at high temperatures, while the Δη values of {x12-butanol + x22-propanol} and {x12-butanol + x23-amino-1-propanol} mixtures are negative over the whole composition range and decrease with increasing temperature. The excess molar quantities were correlated by the Redlich–Kister equation. The ERAS model was used to correlate the excess molar volumes of the mixtures at temperatures of (298.15, 303.15, 313.15) K. Comparison between the calculated and experimental VmE values shows good agreement for all three mixtures.