Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

New isothermal binary vapour-liquid equilibrium (VLE) systems of 1-pentanol + 2, 2, 4trimethylpentane at 350.2, 360.2 and 370.2 K, methyl-tert-butyl-ether + 2, 2, 4trimethylpentane at 307.2, 317.2 and 327.2 K and methyl-tert-butyl-ether + 1-pentanol at 317.2 and 327.2 K were measured. The vapour-liquid equilibrium data were measured using a dynamic low pressure glass still. The experimental data were regressed using the - approach (combined method) with the Wilson, NRTL and UNIQUAC activity coefficient models for description of the liquid phase non-ideality. The virial equation of state with the Hayden and O'Connell correlation for the second virial coefficient was used to describe the vapour phase non-ideality. The system of 2, 2, 4- trimethylpentane + 1-pentanol exhibited a minimum boiling azeotrope. The methyl-tert-butyl-ether + (2, 2, 4-trimethylpentane/1-pentanol) systems showed positive deviation from Raoult's law. The aforementioned activity coefficient models correlated the experimental data well. The thermodynamic consistency of the experimental data was carried out using the point test of Van Ness and the Herrington area test.