Solubilities of {α-d-glucose in water + (acetic acid or propionic acid)} mixtures at atmospheric pressure and different temperatures

• The solubility of α-d-glucose in binary mixtures has been obtained in this work.
• The solubility decreases with the increase of volume fraction of water in the solvents.
• The solubility of α-d-glucose increases with the increase of temperature.
• The results show that the three models agree well with the experimental data.
• The Apelblat equation was more accurate than the λh model and ideal model.

Using dynamic method and the laser monitoring observation technique, the solubility of α-d-glucose in {water + (acetic acid or propionic acid)} was measured over the temperature range (297.55 to 331.45) K at atmospheric pressure. Its corresponding (solid + liquid) equilibrium data will provide essential support for industrial design and further theoretical studies. The solubility of α-d-glucose in the mixtures of (water + acetic acid), and (water + propionic acid) was found to increase with increasing temperature and decrease with increasing volume fractions of acetic acid, and propionic acid in aqueous solution. The experimental data were correlated by using the Apelblat equation, the λh equation and the ideal solution equation. The results showed that these three models agreed well with the experimental values, and the Apelblat equation was found to regress the solubility data better than the other two models.