Eight sets of experimental P-T-x data were determined for 2-propanol-1
,4-dioxane mixtures using an ebulliometer. Five popular activity coeff
icient models and a coexistence equation have been used to correlate e
ach set of data through different optimization methods to obtain value
s of the vapor phase compositions and excess Gibbs free energy. The re
sults of these correlations have been compared. An attempt was made to
evaluate the group interaction parameters for alcohol-1,4-dioxane mix
tures to improve VLE predictions using the UNIFAC method. (C) 1998 Els
evier Science B.V. All rights reserved.