Abstract
Continuous extractive distillation is a widely used method to separate binary and multicomponent azeotropic mixtures. Large scale application and heavy energy usage play an important role in discovering more efficient separating agents. Separating agent (entrainer) selection for extractive distillation of binary mixtures is usually based on the analysis of relative volatility diagrams of components to be separated. Selective effect of entrainer is due to the differences in character and intensity of intermolecular interactions between entrainer and original mixture compounds. Accordingly, it is reasonable to additionally evaluate excess Gibbs energy magnitudes in binary systems formed by compounds of original mixture and entrainer(Raeva et al., 2011a).