Vapor‐liquid equilibria of Benzene–<i>n</i>‐hexane and benzene‐cyclohexane systems

Abstract

Abstract Vapor‐liquid equilibria of two binary systems, benzene– n ‐hexane and benzene‐cyclohexane, were measured at pressures from 4 to 18 atm. The three‐constant Redlich‐Kister equation was found satisfactory for correlation. With the benzene‐ n ‐hexane system no azeotrope occurred; with the benzene‐cyclohexane system an azeotrope appeared, and the mole fraction of cyclohexane in it diminished with increase in pressure. Lack of correction for fugacity in the vapor phase introduced a maximum error of 4% in activity coefficients at highest pressure.