Vapour-liquid equilibrium data in the two binary 2-propanol + 3-methyl-2-butanone, and 3-methyl-2-butanone + 2,2,4-trimethylpentane systems, and in the ternary 2-propanol + 3-methyl-2-butanone + 2,2,4-trimethylpentane system are reported. The data were measured isothermally at 330.00 and 340.00 K covering the pressure range 25-55 kPa. The binary vapour-liquid equilibrium data were correlated using the Wilson, NRTL, and Redlich-Kister equations; resulting parameters were then used for calculation of phase behaviour in the ternary system and for subsequent comparison with experimental data. (c) 2007 Elsevier B.V. All rights reserved.