Collect. Czech. Chem. Commun. 1989, 54, 2840-2847

Vapour-liquid equilibrium in the ternary system cyclohexane-acetic acid-propionic acid

Ivona Malijevská, Alena Maštalková and Marie Sýsová

Department of Physical Chemistry Prague Institute of Chemical Technology, 166 28 Prague 6


Isobaric equilibrium data (P = 101.3 kPa) for the system cyclohexane-acetic acid-propionic acid have been measured by two different analytical techniques. Activity coefficients calculated by simultaneous solving of equations for the chemical and phase equilibria were subjected to a consistency test based on inaccuracies determined from the error propagation law, and were correlated by Wilson’s equation. The activity coefficients measured were compared with those calculated from binary vapour-liquid equilibrium data and with values predicted by the UNIFAC method.