SOLUBILITY OF BENZOYL-SUBSTITUTED NAPHTHOLS IN MIXTURES OF HEXANE AND 1-BUTANOL

The solubilities of 2-benzoyl-1-naphthol, l-benzoyl-2-naphthol, and 4-benzoyl-1-naphthol have been determined experimentally in pure hexane and 1-butanol and in seven mixtures of hexane and 1-butanol by a dynamic method from 285 to 330 K. Systems of 2-benzoyl-1-naphthol with mixed solvent were found to exhibit the synergetic effect of solubility. The results in binary systems have been correlated by using the classical equation for solid-liquid solubility and the activity coefficients correlated by means of three equations that describe the Gibbs excess free energy of mixing, GE: the equations of Wilson, UNIQUAC, and NRTL. In ternary systems, the values of activity coefficients have been predicted by the Wilson, UNIQUAC, and NRTL equations. The solvent-solvent parameters were obtained from literature VLE data. © 1990, American Chemical Society. All rights reserved.