Azeotropes at elevated pressures for systems involving cyclohexane, 2-propanol, ethyl acetate, and butanone

A new stainless steel apparatus for measuring azeotropic points of binary a s well as multicomponent systems at elevated pressures has been developed. The azeotropic temperatures and compositions of six binary systems composed of cyclohexane, 2-propanol, ethyl acetate, and butanone were determined at elevated pressures, correlated by empirical equations with pressure, and p redicted by the UNIFAC group contribution method. The calculations demonstr ate that the correlated data are in good agreement with experimental values .