We report new experimental liquid-liquid equilibrium data for the tern
ary mixtures water + methanol + n-amyl acetate and water + ethanol + n
-amyl acetate at 25, 35 and 45 degrees C, together with the results of
fitting the data with UNIQUAC equations. The activity coefficients of
water and the alcohol in water + (methanol or ethanol) mixtures were
calculated using UNIQUAC parameters obtained from experimental data fo
r each of a number of ternary mixtures including water and the alcohol
in question.