Thermodynamics of mixtures containing a very strongly polar compound. 11. 1-Alkanol + alkanenitrile systems

摘要: Abstract 1-Alkanol + alkanonitrile systems have been studied by means of the DISQUAC, ERAS and UNIFAC (Dortmund) models. DISQUAC parameters for alkanol/nitrile interactions are reported. describes a whole set thermodynamic properties: phase equilibria, vapor–liquid (VLE), liquid–liquid (LLE) solid–liquid (SLE) molar excess functions: Gibbs energies, G m E , enthalpies, H partial enthalpies at infinite dilution, i ∞ using same interaction each solution. The dependence on molecular structure is similar to that observed in other previous applications mixtures formed 1-alkanols strongly polar compound, such way quasichemical interchange coefficients can be kept constant from 1-propanol. However, methanol ethanol solutions behave differently. From analysis experimental data T S ( = − ) volumes, V it concluded characterized dipolar strong structural effects. former more relevant acetonitrile solutions. Association effects important butanenitrile mixtures. gives better results than model. containing also improved UNIFAC. This remarks importance investigated variation (x1 = 0.5) with 1-alkanol size given nitrile, but concentration this function poorly represented.