The liquid-liquid equilibrium (LLE) properties were measured for the ternary systems of water + methanol + dimethyl adipate, water + adipic acid monomethyl ester + dimethyl adipate and water + methanol + dimethyl glutarate at temperatures ranging from 298.15 to 318.15 K under atmospheric pressure. Each ternary system exhibited type-I LLE behavior and the region of heterogeneity was found to increase with a decrease of temperature. These new LLE data were correlated with the NRTL model and also used to examine the validity of various versions of the UNIFAC models. (c) 2006 Elsevier B.V. All rights reserved.