Abstract (EN):
(Solid + liquid) equilibria of binary mixtures containing high-value compounds and ethyl lactate were
studied. Using the gravimetric method, the solubility of various solutes such as caffeine, vanillic acid,
ferulic acid, caffeic acid and thymol in ethyl lactate was measured as a function of temperature over
the range of (298.2 to 343.2) K, at atmospheric pressure. The differences in solubility of a given solute
in water-saturated and dry ethyl lactate were observed. The deviation of these binary systems from ideal
mixture behaviour was discussed. In order to understand the solubilization process, melting properties of
pure solutes were determined by differential scanning calorimetry (DSC). The solubility data obtained
were represented using UNIQUAC and UNIFAC-based models as well as with the Cubic-Plus-Association
(CPA) equation of state. The results of the modeling indicate that these models are the appropriate tools
for representing the solubility behaviour of various solutes in ethyl lactate.
2011 Elsevier Ltd. All rights reserved
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
8