Abstract

Sirichot Krajangsod¹, Sumitta Chotikamas², Atthasit Tawai¹ and Malinee Sriariyanun¹

DOI : http://dx.doi.org/10.13005/ojc/340129

Purification process of erythritol in industrial production are currently composed of multiple steps. To improve the purification efficiency and to operate the working condition precisely, the solubility property of erythritol should be monitored. In this study, the erythritol solubilities in aqueous solvents including methanol, ethanol and 2-propanol were experimentally measured by using the gravimetric method within the temperature range of 273.15 K to 283.15.15 K (with 2 K interval) and 283.15 K to 323.15 K (with 10 K interval). The experimental results showed that erythritol solubility increased due to the increase of temperature but decrease of mass fraction of organic solvent. The solubility was also depended on polarities of solvents. The lowest solubility was obtained when using aqueous ethanol. To generate solubility model of erythritol, Apelblate equation, Buchowski-Ksiazaczak λh equation and Van’t Hoff model were applied to explain correlation and behavior of erythritol solubility. Based on statistical analysis, Apelblate equation obtained the best correlation to the experimental data compared to Buchowski-Ksiazaczak λh equation and Van’t Hoff model. The solubility model with the estimated parameters could be further applied for optimizing purification processes of erythritol in industries.

Erythritol; Solubility; Purification; Gravimetric Method

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