M. Govindarajan et Pl. Sabarathinam, SALT EFFECT ON LIQUID-LIQUID EQUILIBRIUM OF THE METHYL ISOBUTYL KETONE-ACETIC ACID-WATER SYSTEM AT 35-DEGREES-C, Fluid phase equilibria, 108(1-2), 1995, pp. 269-292
The effect of inorganic salts (sodium chloride, sodium nitrate, sodium
sulphate, zinc sulphate and ammonium sulphate) on the methyl isobutyl
ketone-acetic acid-water system at 35 degrees C has been studied and
the correct experimental procedure for the determination of the data o
f salt containing ternary liquid-liquid equilibrium (LLE) systems asce
rtained. The Campbell correlation is modified to fit the data of salt
containing ternary liquid systems. The distribution data of these salt
containing systems have been correlated through the use of the modifi
ed Nernst, modified Campbell and the Eisen-Joffe equations and the con
stants obtained have been used to predict extract phase solute concent
rations and also to calculate the salt effect parameter. Results based
on the modified Nernst equation show the following order of effective
ness of salts: ZnSO4 > Na2SO4 > (NH4)(2)SO4 > NaCl > NaNO3. The order
of effectiveness of the salts based on the salt effect parameter deriv
ed from the modified Campbell and the Eisen-Joffe constants are also d
iscussed.