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Beyond biochemical functions, carbohydrates have great industrial and economic importance. To improve industrial processes and to develop new applications for these substances, the knowledge of their solubility behavior in different solutions is often necessary. Therefore, the purpose of this work was to collect experimental data on the solubility of fructose and sucrose in hydroalcoholic solutions of methanol and water, using a chromatographic method. The solubility was evaluated for the entire mole fractions of the binary mixture covering the temperatures from 298.15 K to 323.15 K. The results indicated that the chromatographic method is suitable for determining sugar concentration, but it implies an increased uncertainty over the results. The solubility of both sugars was low in methanol-rich binary mixtures, rising with the increasing proportion of water. Greater dependence of the solubility as a function of the composition of the binary mixture was observed for sucrose, indicating stronger molecular interaction and therefore greater deviation from ideality. The NRTL activity coefficient model and the PC-SAFT and CPA equations of state were successfully employed to correlate the solid-liquid equilibrium. The binary interaction parameters were optimized as a function of temperature. The NRTL model has shown greater deviations than those presented by the equations of state. Meanwhile, the equations of state have presented a similar performance. • Sucrose and fructose solubility in water-methanol mixtures determined by HPLC. • The experimental data were analyzed using CPA and SAFT equations of state along with the NRTL activity coefficient model. • Binary interaction parameters were generated as a function of temperature. • The equations of state CPA e SAFT worked better than the NRTL model. [ABSTRACT FROM AUTHOR]

The development of techniques related to biomass conversion into chemical products needs additional study and advances. It is necessary to perform experimental investigations and modeling in order to produce information about mixtures that could be used as reaction media or in separation processes. Research on phase equilibrium is fundamental for the achievement of valuable knowledge. Therefore, this research aims to perform a study of xylitol and sorbitol solubility in methanol-ethanol mixtures throughout the molar composition range and at temperatures ranging from 293.15 K to 323.15 K, under atmospheric conditions. The Jouyban-Acree, NRTL and UNIQUAC models were fitted to experimental data. The parameters of the models were explicitly obtained as temperature dependents. [ABSTRACT FROM AUTHOR]