Thermophysical Properties, Raman and FTIR Spectroscopy, and Their Correlations for the Butylamine (1) + 2-Butanone (2) System

Abstract

In this paper, we reported density ρ and viscosity η measurements for pure butylamine and 2-butanone as well as for the binary system [butylamine (1) + 2-butanone (2)] over the whole composition range and at the temperature range of (288.15−318.15) K. Experimental data were fitted to empirical equations, which allow for the calculation of these properties for the purecomponents and binary system over the whole concentration and temperature ranges studied. In the same way, experimental data of the binary system were further used to calculate the excess molar volume VE and viscosity deviation Δη as a function of composition and temperature using an extended Redlich−Kister [Redlich, O.; Kister, A. T. Algebraic Representation of ThermodynamicProperties and the Classification of Solutions. Ind. Eng. Chem. 1948, 40, 345− 348] equation type. The experimental data of the excess molar enthalpy HE for all binary systems and the (vapor + liquid) equilibrium isotherm for binary system [butylamine (1) + 2-butanone (2)] at 298.15 K were also reported, and the excess Gibbs energy GE and excess entropy SE were calculated. The binary system [butylamine (1) + 2-butanone (2)] exhibits an azeotrope and negative deviation from the ideal behavior. On the other hand, the Raman and FTIR spectra confirm molecular associations, heteroassociations, and the inferences obtained from thermophysical properties for binary system [butylamine (1) + 2- butanone (2)].