SOME NUMERICAL ANALYSES ON THE SOLUBILITY OF VANILLIN IN CARBITOL® + WATER SOLVENT MIXTURES

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®.

• Autores: Martínez, Fleming; Jouyban, Abolghasem; Acree Jr., William E.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2015
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/66306
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/66306; http://bdigital.unal.edu.co/67330/
• Palabra clave: 54 Química y ciencias afines / Chemistry; Vanillin; Carbitol® + water mixtures; Jouyban-Acree model; preferential solvation; IKBI; vainillina; mezclas Carbitol® + agua; modelo Jouyban-Acree; solvatación preferencial; IKBI
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional