Abstract :
[en] A crucial factor in the development of sustainable crystallization processes is the use of biobased solvents, which, in turn, necessitates a comprehensive understanding of the solubility profiles of solid compounds in biobased solvents. The solubility of timolol maleate (TIM), used to treat glaucoma, was measured in commercial biobased solvents at temperatures ranging from 278.15 to 333.15 K using the polythermal method. Its solubility was determined in eight neat biobased solvents (acetone, 1-butanol, Cyrene, dimethyl isosorbide (DMI), ethanol, 2-methyltetrahydrofuran (2-MeTHF), 2-propanol, and water) and three binary solvent mixtures (ethanol + 2-propanol, ethanol + 2-MeTHF, and ethanol + DMI). It was demonstrated that the solubility of TIM increases with temperature in the pure solvents and solvent mixtures. Furthermore, the solubility of TIM decreases in ethanol with increasing 2-propanol, 2-MeTHF, or DMI content, which may act as antisolvents. The experimental solubility data of TIM in the pure solvents and binary solvent mixtures were correlated using the modified Apelblat, Yaws, and λh equations. The correlated solubility data agree well with the experimental results, indicated by the small relative deviation and average relative deviation (ARD %) values. The correlated and experimentally determined solubility data provide crucial information for the design of sustainable crystallization processes for TIM.
Scopus citations®
without self-citations
0