The total vapour pressure for the ternary mixture cyclohexane-methanol-hexane and constituent binary systems methanol-hexane and cyclohexane-hexane were measured at 293.15 K with a modified static method. Different expressions for G(E) suitable for the correlation of these data as well as an equation of state incorporating an association term are tested. The possibility to predict ternary VLE from constituent binary data and the simultaneous correlation of VLE and LLE data at 293.15, 303.15 and 313.15 K is investigated.