SOLUBILITY OF BENZIL IN BINARY ALKANE PLUS CYCLOOCTANE SOLVENT MIXTURES - COMPARISON OF PREDICTIVE EXPRESSIONS DERIVED FROM THE NEARLY IDEAL BINARY SOLVENT (NIBS) MODEL

Experimental solubilities are reported for benzil dissolved in seven b inary mixtures containing cyclooctane with n-hexane, n-heptane, n-octa ne, n-nonane, methylcyclohexane, 2,2,4-trimethylpentane, and tert-buty l-cyclohexane at 25 degrees C. Results of measurements are compared to the predictions of equations developed previously for solubility in s ystems of nonspecific interactions. The most successful equation in te rms of goodness of fit involved a volume fraction average of the exces s Gibbs free energies relative to the Flory-Huggins model, and predict ed the experimental solubilities in the seven systems studied to withi n an overall average absolute deviation of 2.1% and with a maximum dev iation of 3.6%.