Vapor–Liquid Equilibrium for Ternary and Binary Mixtures of 2-Isopropoxypropane, 2-Propanol, and N,N-Dimethylacetamide at 101.3 kPa

Vapor–liquid equilibrium (VLE) data of the 2-isopropoxypropane + 2-propanol + N,N-dimethylacetamide ternary system have been reported at 101.3 kPa, as well as for 2-isopropoxypropane + 2-propanol and 2-isopropoxypropane + N,N-dimethylacetamide + and 2-propanol + N,N-dimethylacetamide binary systems. From the results of the VLE data, it passed the thermodynamic consistency test. The universal functional (UNIFAC), universal quasichemical (UNIQUAC), nonrandom two-liquid (NRTL), and Wilson models were used to correlate the activity coefficients with its composition. The results indicate that these models allow a very good prediction of the phase equilibrium of the ternary system using the pertinent parameters of the binary systems. The 2-isopropoxypropane + 2-propanol binary azeotropes are eliminated by N,N-dimethylacetamide, and there is a significant change with phase equilibrium behavior. Hence, the N,N-dimethylacetamide appears to be an effective solvent.