The salting coefficient and size of alkylamines in saline media at different temperatures: estimation from Pitzer equations and the mean spherical approximation
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The salting coefficient and size of alkylamines in saline media at different temperatures: estimation from Pitzer equations and the mean spherical approximationAutor(es)
Fecha
2001-04Cita bibliográfica
Taboada-Pan C, Brandariz I, Barriada JL, Vilariño T, Sastre De Vicente ME. The salting coefficient and size of alkylamines in saline media at different temperatures: Estimation from Pitzer equations and the mean spherical approximation. Fluid Phase Equilib. 2001;180(1-2):313-25
Resumen
The renewed theoretical interest in the proton transfer associated to the amino group together with the scarcity of acid-base studies of amines in moderate to concentrated saline media focussed our attention on the study of the basicities of some alkylamines, namely monomethyl, dimethyl and trimethylamine, in aqueous saline solutions of KCl at various temperatures.
A non-conventional analysis of stoichiometric equilibrium constants versus ionic strength data is carried out. On one hand, Pitzer’s model is easily applied to calculate the salting coefficient and the thermodynamic equilibrium constant of the alkylamines. On the other hand, the mean spherical approximation has the advantage over the Debye–Hückel based theories that it can account for effects produced by species of different sizes. Here, it is applied to predict the dependence of the salting behavior on the size of the alkylamines.
Palabras clave
Salting coefficient
Size of alkylamines
Pitzer model
Mean spherical approximation
Chemical equilibrium
Activity coefficients
Size of alkylamines
Pitzer model
Mean spherical approximation
Chemical equilibrium
Activity coefficients
Versión del editor
ISSN
0378-3812