Solubility of Solids in Near Critical Conditions: Effecdt of a Third Component

K.I. GUTKOWSKI, R. FERNANDEZ-PRINI Y M.L. JAPAS

Journal Physical Chemistry B

American Chemical SOc.

Lugar: New York, EE.UU.; Año: 2008 vol. 112 p. 5671 - 5679

1520-6106

The effect of cosolvents in the solubility equilibria near the critical end-point of binary mixtures is anlyzed.  The problem has received recent attention for the particular case of ionic cosolvents where a pronounced salting-out effect was predicted. Here we make a thermodynamic analysis to view the problem from a different perspective. Our conclusions are that, at the critical end-point, The Setchenov constant, which reflects the effect of cosolvents on solubility equilibria, diverges following the behavior of the osmotic susceptibility and that the sign of the divergence is encoded in the critical end-line of the ternary system.