Acoustical and physico-chemical study of binary azeotropes (aniline)

The possibility of azeotrope formation between a butanol isomer, toluene with aniline is studied by examining the relative volatility calculation for all the six binary mixtures at the considered mole fractions. The study is carried out through density, viscosity and ultrasonic velocity measurements. Thermo-acoustical parameters such as molar volume, adiabatic compressibility, free length, free volume, internal pressure and their excess values are obtained from the experimental study for all the mixtures with a view to investigate the exact nature of molecular interaction. For this, the necessary standard values of the individual components are included. The nature of the existence of the suggested interaction is found to be useful in predicting the azeotropic formation and determining the exact mole fraction of such formations. (C) 2020 Elsevier B.V. All rights reserved.