Abstract
Abstract The VLE data of 85 points for a system of ethyl acetate–ethanol–toluene were measured at atmospheric pressure. The results were examined by boilling-point calculations using two forms of the Wilson equation: one with constants of constituent binary systems and the other with constants from a least-squares fit minimizing the Q-function(gE⁄RT=Σxilnγi) of the ternary data. Two binary systems, ethyl acetate–ethanol and ethanol–toluene, show minimum azeotropic points. The normal boiling point of toluene is much higher than the boiling points of the other two substances by 32–3 K. Because the system had a complicated behavior, calculations using the Wilson equation had difficulty to accurately cover the entire area of compositions.
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