Vapor-liquid critical locus (x, T-c, P-c) has been determined, in the whole range of mole fractions, for the systems {n-hexane + methanol, or +ethanol, or +propan-1-ol, or +butan-1-ol} and {CO2 + methanol, or +ethanol, or +propan-1-ol, or +butan-1-ol. A comprehensive bibliographic review for the vapor-liquid equilibrium (VLE) and the critical locus of these systems has been performed, and they have been modelled with PC-SAFT EoS. The three parameters that characterize the segments of pure compounds have been rescaled from their critical point values. In all cases, the classical mixing rules and temperature-dependent binary interaction parameters k(ij)(T) = K-ij(0)+k(ij)(1)T have been used. The average deviations obtained for the n-hexane + alkan-1-ol binary mixtures are: for critical loci, mean relative deviation in critical temperature MRD(T-c)=0.47% and in critical pressure MRD(P-c)=3.38%; for VLE, mean relative deviation in bubble pressure MRD(P)=2.90% and absolute deviation for the solvent mole fraction in the vapor phase Delta y(C6H14)=0.031. The average deviations obtained for the CO2 + alkan-1-ol binary mixtures are MRD(T-c)=1.91% and MRD(P-c)=5.93%; MRD(P)=7.07% and Delta y(CO2)=0.022. (C) 2012 Elsevier B.V. All rights reserved.