Abstract
A method for measuring isobaric vapor-liquid equilibrium data for binary systems with limited miscibility is presented. The method involves of the determination of the dew-point isobar, the bubble-point isobar, and the liquid-liquid equilibrium at bubble-point. The dew-point isobar was determined by means of a vapor mixing method. The bubble-point isobar and the miscibility gap were determined by an ebulliometric method. Measurements were made for the binary systems methyl ethyl ketone - water, water - methyl isobutyl ketone and water - n-butylacetate, at 760 Torr. The experimental VLE data were checked for thermodynamic consistency by means of the generalized Gibbs-Duhem equation and correlated by the modified Redlich-Kister equation.
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