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

ABSTRACT

The solubility of 4,4'-dihydroxydiphenyl sulfone in acetonitrile, methanol, ethanol, n-propanol, isopropyl alcohol, acetone, 1-butanol, 2-methyl-1-propanol and ethyl acetate were determined at temperatures from (278.15 to 313.15) K under 101.3 kPa by using a gravimetric method. With the increase in temperature, the solubility of 4,4'-dihydroxydiphenyl sulfone in these solvents increased. The solubility values decreased according to the following order: acetone greater than acetonitrile greater than ethyl acetate greater than1-butanol greater than (methanol, ethanol, n-propanol, 2-methyl-1-propanol) greater than isopropyl alcohol. The obtained solubility data were correlated with three models, which corresponded to the modified Apelblat equation, h equation, and Van t Hoff equation. The evaluated solubility values by the modified Apelblat equation agreed very well with those calculated by the other two models. In general, the regressed results with the three models were all within the acceptable limit for the solubility of 4,4'-dihydroxydiphenyl sulfone in the selected solvents. Furthermore, the standard dissolution enthalpies per 1 mol of mixtures of 4,4'-dihydroxydiphenyl sulfone and solvent were evaluated in terms of the modified Apelblat equation. The dissolution process of 4,4'-dihydroxydiphenyl sulfone in these solvents was endothermic. The study concerning the solubility of 4,4'-dihydroxydiphenyl sulfone in the selected solvents and thermodynamic property of dissolution could provide fundamental data in the manufacturing and separating process of 4,4'-dihydroxydiphenyl sulfone.