THERMODYNAMIC PROPERTIES OF ALKANEDIOLS PLUS ACETATES AT 298.15 K

In this work we present experimental values of the density, refractive index, speed of sound, isentropic compressibility and liquid-liquid e quilibria of the binary mixtures (methyl acetate, ethyl acetate, propy l acetate, and butyl acetate) with (1,2-ethanediol, 1,2-propanediol, o r 1,3-propanediol) at 298.15 K and atmospheric pressure, as a function of mole fraction. From the experimental values, the corresponding exc ess and deviation values were computed (excess molar volumes, changes of refractive index on mixing, and changes of isentropic compressibili ty), variable-degree polynomials being fitted to the results. The vali dity of different estimation methods for predicting the experimental v alues of physical properties was tested. The limiting partial excess m olar volume of the components in each binary mixture was determined by means of predetermined Redlich-Kister parameters. Group contribution method (UNIFAC-Dortmund) was applied in order to compare their capabil ity in predicting the experimental equilibria values.