Abstract
Infinite dilution binary activity coefficients have been measured for 6 systems at 40 to 100°C by using an ebulliometer, to develop an accurate and rapid method for determining the group Wilson parameters for predicting liquid phase activity coefficients by "Analytical Solutions of Groups" model. The systems measured are methanol-n-heptane, ethanol-n-heptane, n-butanolwater, acetone-n-heptane, acetone-methanol, methyl ethyl ketone-water. The group Wilson parameters for any system made up of CH2, OH, CO groups have been determined at 40 to 100°C. Predictions of infinite dilution activity coefficients and isobaric vapor-liquid equilibria made for 32 binary and 8 ternary systems involving alcohols, water, paraffins, ketones showed good agreement with observed values.
