Salting-out effect of single salts NaCl and KCl on the LLE of the systems (water + toluene + acetone), (water + cyclohexane + 2-propanol) and (water + xylene + methanol)

The effect of single salts sodium and potassium chlorides on the distribution of the solute components acetone, 2-propanol and methanol between the two coexisting and equilibrated liquid phases of the solvent components (water + toluene), (water + cyclohexane) and (water + xylene), respectively, are experimentally investigated in the present work. The mass fraction of the salt in the overall (and heterogeneous) quaternary mixture amounted to 5, 10 and 20%. The temperature was 298 K, the pressure was atmospheric. Strong electrolytes NaCl and KCl significantly affect the solubility of the solute in the organic phase. The distribution coefficient of every solute increases with raising the amount of electrolyte. This salting-out effect is more pronounced for NaCl than for KCl. The effect may be particularly useful to eliminate solutropy. The tie line data are correlated using the McDevit and Long method.