Impact of physio-thermo properties on the azeotrope formation in benzene – 1-alkanol blends

First point of view of this report is briefly comments about the potential of azeotrope development in the blends of 1-alkanols (1-pentanol/1-hexanol/1-heptanol) with benzene. The relative volatility (r) calculation of all binary blends was used to prove this possibility of the azeotrope formation. Second point of view of this report is also concerned with the same idea but achieved by ultrasonic study using different parameters such as ultrasonic velocity (U), density (ρ), and viscosity (η), and few thermo–acoustical variables like adiabatic compressibility (β), free length (Lf), free volume (Vf), and internal pressure (πi), and their excess (AE) magnitudes. In this regard, the important standard magnitudes of the individual components and their mixtures are experimental measured. The origin of the existence of the suggested intermolecular interaction is found to be useful in predicting the possible azeotrope formation and in determining the exact mole fraction of such formations. The excess parameters are fitted to polynomial type Redlich-Kister equation and coefficients of the fitting are found to support the present investigations.