Isobaric vapour-liquid equilibrium (VLE) data for the binary mixture cyclohexane+1-butanol and for the ternary system cyclohexane+1,3-dioxolane+1-butanol have been obtained with a recirculating still at 40.0 and 101.3kPa. We also have determined isobaric VLE data at 101.3 kPa for the systems n-hexane+1,3-dioxolane and n-hexane+1,3-dioxolane+1-butanol. The experimental data for all the systems were checked for thermodynamic consistency using the method of Van Ness. Activity coefficients have been correlated with different equations (Wilson, van Laar, Margules, NRTL and UNIQUAC) giving satisfactory results. Predictions with the group contribution methods ASOG and UNIFAC were obtained and compared with the experimental data.