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COO. To determine the coefficients in nonlinear polynomial expansion equations, genetic algorithms were adapted. The calculated results gave a reasonable correlation accuracy of ionic conductivity and viscosity. After building the polynomial expansion equations, quantitative analyses were done for each descriptor, and the physicochemical meaning of each descriptor was examined. These results suggest that the ionic conductivity of each ionic liquid is governed not only as a liquid electrolyte but also as a solid electrolyte.

Isobaric vapor−liquid equilibria were measured for the ternary system ethanol + water + ethylene glycol and its three constituent binary mixtures at 101.3 kPa using a modified Rogalski−Malanoski equilibrium still. The thermodynamic consistency of experimental binary data was checked using the point and area tests. The experimental binary data were then correlated by the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical activity coefficient (UNIQUAC) equations. The ternary vapor− liquid equilibria data were predicted using the binary parameters for the three equations with good accuracy. The selectivity of ethylene glycol as entrainer for the separation of the azeotropic system ethanol + water by extractive distillation was discussed using the NRTL parameters.