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

ABSTRACT

In this work, the solubility of dimethyl terephthalate (DMT) in 17 solvents including 6 alcohols (methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol), 6 esters (ethyl acetate, i-propyl acetate, n-propyl acetate, n-butyl acetate, n-amyl acetate, methyl propionate), 3 ketones (acetone, methyl ethyl ketone, cyclohexanone), acetonitrile and chloroform was experimentally determined. The solubility of DMT in these solvents increases with increasing temperature and follows the order of chloroform greater than esters and ketones greater than acetonitrile greater than alcohols. Correlations of the solubility with temperature have been performed in terms of three semi-empirical models (modified Apelblat, h and three-parameter Van't Hoff) and two activity coefficient models (Wilson and NRTL). The maximum relative average deviation is 2.32% and the maximum root-mean-square deviation is 31.63x10-5. Better fittings were observed for the activity coefficient models. In addition, the mixing properties (Gibbs energy, enthalpy, entropy, activity coefficients at infinitesimal concentration, and reduced excess enthalpy at infinitesimal concentration) were evaluated using Wilson model.