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

ABSTRACT

In the present work, the benzoin solubility in ethanol, methanol, n-propanol, isopropanol, n-butanol, acetone, ethyl acetate, acetonitrile, cyclohexane, butyl acetate, isobutanol and toluene and ethyl acetate + ethanol solvent mixtures was measured by using the static method at the temperature range from 273.15 K to 313.15 K under atmospheric pressure (101.1 kPa). The solubilities in mole fraction increased with increasing temperature and followed the order from high to low in the selected mono-solvents: ethyl acetate greater than acetone greater than butyl acetate greater than (acetonitrile, toluene) greater than methanol greater than ethanol greater than n-propanol greater than n-butanol greater than isobutanol greater than isopropanol greater than cyclohexane; and for the ethyl acetate + ethanol mixture, the mole fraction solubilities of benzoin increased with the increase in temperature and ethyl acetate mass fraction. The obtained solubility of benzoin in neat solvents was correlated with the Apelblat equation, Eh equation, Wilson and NRTL models; and in solvent mixtures of ethyl acetate (w) + ethanol (1-w), with the Jouyban.Acree, van ft Hoff-Jouyban.Acree and Apelblat-Jouyban.Acree models. The largest value of root-mean-square deviation was 4.02 ~10-4, and relative average deviation, 2.36 ~10-2. Furthermore, the mixing enthalpy, mixing Gibbs energy, mixing entropy, activity coefficients under infinitesimal concentration ( 1 A ) and reduced excess enthalpy ( E, 1 H ) were deduced.