Services on Demand
Journal
Article
Indicators
Cited by SciELO
Access statistics
Related links
Cited by Google
Similars in SciELO
Similars in Google
Share
Revista Colombiana de Química
Print version ISSN 0120-2804
Abstract
MARTINEZ, Fleming; JOUYBAN, Abolghasem and ACREE, William E. Some numerical analyses on the solubility of vanillin in Carbitol® + water solvent mixtures. Rev.Colomb.Quim. [online]. 2015, vol.44, n.2, pp.34-39. ISSN 0120-2804. https://doi.org/10.15446/rev.colomb.quim.v44n2.55218.
In this communication some reported solubility values of vanillin (component 3) in 2-(2-ethoxyethoxy)ethanol (Carbitol®, component 1) + water (component 2) mixtures at five temperatures from 298.15 to 318.15 K were correlated with the Jouyban-Acree model combined with van't Hoff or Apelblat equations, obtaining models in second degree regarding the mixtures compositions. Mean percentage deviations were near to 6.0%. On the other hand, by means of the inverse Kirkwood-Buff integrals it was demonstrated that vanillin is preferentially solvated by water in water-rich mixtures (with a minimum δx1,3 value in the mixture x1 = 0.05, i.e. -4.29 x 10-2) but preferentially solvated by the cosolvent in mixtures with compositions 0.12 < x1 < 1.00 (with a maximum δx1,3 value equal to 3.61 x 10-2 in the mixture x1 = 0.25). It is conjectural that hydrophobic hydration plays a relevant role in the first case, whereas, in the second case, vanillin would be acting as Lewis acid with Carbitol®.
Keywords : Vanillin; Carbitol® + water mixtures; Jouyban-Acree model; preferential solvation; IKBI.