Vapour-liquid equilibrium data in binary methyl tert-butyl ether-n-hexane and methyl tert-butyl ether-toluene mixtures were determined experimentally. The data were described thermodynamically by the one-constant Redlich-Kister equation.
The course of the second derivative of Gibbs' energy with respect to composition for binary systems is evaluated. The representation of this quantity in terms of different correlation relations (the Wilson, NRTL and UNIQUAC equations and the ASOG and UNIFAC methods) is also discussed.
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