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

ABSTRACT

The solubility of 3-Hydroxy-2-naphthoic acid in ten commonly used solvents and binary mixtures under atmospheric pressure was determined with gravimetric method as temperature varied from 293.15 K to 333.15 K. Methanol, ethanol, n-propanol, isopropanol, nbutanol, isobutanol, acetone, acetic acid, methyl acetate and ethyl acetate were used as pure solvents for 3,2-HNA, and ethanol + n-propanol were selected as binary mixed solvents. What can be concluded is that the solubility of 3,2-HNA in all kinds of solvents increases as temperature goes up. In addition, empirical equations containing Modified Apelblat equation and eh equation and activity coefficient models, such as NRTL model and UNIQUAC Model, were chosen to correlate with the solubility data. The correlation results agreed with the measured data very well. Therefore, the measured results and thermodynamic study of 3-Hydroxy-2-naphthoic will provide help for the practical industrial production.