Experimental
solubility data of dibenzoylmethane (DBM) in three
pure solvents (ethyl acetate, acetonitrile, methylbenzene) and three
binary solvents (methanol + water, ethanol + water, and isopropyl
alcohol + water) were measured by the gravimetric method from 278.15
to 318.15 K under atmospheric pressure. The experimental results showed
that the solubility of DBM increased with the increase of temperature.
Moreover, the solubility of DBM was temperature-dependent when the
type and composition of solvents remained unchanged. The solubility
of DBM decreased with the increase of solvent polarity because the
molecular structure of DBM was not conducive to the formation of hydrogen
bonds between solute and solvent molecules. The solubilities of DBM
were correlated by the modified Apelblat equation, the van’t
Hoff equation, the λh equation, and the NRTL
equation. The modified Apelblat model produced the best fitting results
among these models.