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

ABSTRACT

The solubility of benzoin in mono-solvents (acetone, ethyl acetate, methanol, ethanol, 1-propanol and 1-butanol) and binary solvent mixtures (ethyl acetate + methanol, ethyl acetate + ethanol) was measured using UV-Vis spectroscopy at the temperature ranging from 283.15 K to 323.15 K. It can be seen from the data that the solubility of benzoin increases expectedly as temperature increases in a given solvent or solvent mixture, the solubility in acetone is maximum among six mono-solvents which could be well explained by the existing of strong H-bonds, rather than "like dissolves like" rule. In binary solvent mixtures, the solubility reaches maximum when mole fraction of methanol is 0.1 in ethyl acetate + methanol mixed solvent, while the maximum exhibits at 0.2 of mole fraction of ethanol in ethyl acetate + ethanol. Solubility parameter was interpreted the cosolvency of benzoin solubility in binary solvent mixtures. The solubility data was correlated by modified Apelbalt equation, CNIBS/R-K equation, lambdah equation, Jouyban-Acree model and Van't-JA equation. Mixing thermodynamic properties were further calculated and discussed regarding of their roles in dissolution and solubility.