Abstract
The efficiencies of various methods for the correlation and prediction of vapour/3-liquid equilibria (VLE) in ternary systems of different classes of mixture have been compared. The total pressure data for five ternary systems (acetonitrile/3-ethanol/3-water, acetone/3-ethanol/3-water, 1,4-dioxan/3-ethanol/3-water, benzene/3-2/3-butanone-ethanol, acetone/3-acetonitrile/3-methyl acetate) and VLE data for 15 corresponding isothermal binary systems (acetonitrile-ethanol, acetonitrile-water, ethanol-water, acetone-ethanol, acetone-water, ethanol-water, 1,4-dioxan-ethanol, 1,4-dioxan-water, ethanol-water, benzene-2-butanone, 2-butanone-ethanol, benzene-ethanol, acetone-acetonitrile, acetone-methylacetate and acetonitrile-methyl acetate) have been selected and correlated by means of the NRTL, UNIQUAC, Wilson and NRTLMK equations. The ternary VLE data have then been predicted by the use of the binary parameters of the equations calculated from the appropriate binary VLE data. The correlation and the prediction results have been discussed from the point of view of intermolecular interactions, and some recommendations have been made on the use of the equations investigated for such calculations.
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