PHASE-EQUILIBRIA AND VARIATION OF THE AZEOTROPIC COMPOSITION WITH PRESSURE FOR BINARY-MIXTURES OF 1-PROPANOL PLUS CHLOROBENZENE AND 1-BUTANOL PLUS CHLOROBENZENE

Isobaric vapor-liquid equilibria were obtained for the systems l-propa nol + chlorobenzene and I-butanol + chlorobenzene at 200 and 300 kPa u sing a dynamic still. The mole fraction of the alcohol in the azeotrop ic point increases with pressure and for the 1-propanol + chlorobenzen e system at 300 kPa, the azeotrope has disappeared. The two systems sa tisfy the point-to-point thermodynamic consistency test. Both systems show a positive deviation from ideality. The data were well correlated with the Margules, van Laar, Wilson, NRTL and UNIQUAC equations. (C) 1998 Published by Elsevier Science B.V. All rights reserved.