THERMODYNAMIC BEHAVIOR OF MIXTURES CONTAINING METHYL ACETATE, METHANOL, AND 1-BUTANOL AT 298.15 K - APPLICATION OF THE ERAS MODEL

Excess molar volumes, and changes of refractive indices, of the ternar y mixture methyl acetate + methanol + 1-butanol, and the binary mixtur es methyl acetate + 1-butanol, and methanol + 1-butanol have been eval uated from density, and refractive indices measurements at 298.15 K, a nd 1 atm. These derived properties of binary, and ternary mixtures wer e fitted to Redlich-Kister, and Cibulka type equations, respectively. The ERAS model interaction parameters of the binary systems contained in the ternary mixture were computed, the obtained results showing goo d accuracy. The high polar/associative behaviour of the mixtures shoul d be the cause of high deviations in ternary excess prediction. The ob tained results suggest the convenience of extending the model to multi component polar/associative mixtures in order to take into account all binary polar effects, and higher order polar effects in the mixtures. (C) 1998 Elsevier Science B.V. All rights reserved.