Liquid‐Liquid equilibria of heptane‐methanol‐toluene‐calcium chloride and ethyl acetate‐water‐ethanol‐calcium chloride quaternary systems

Liquid‐liquid equilibria (LLE) data for the heptane‐methanol‐toluene‐calcium chloride and ethyl acetate‐water‐ethanol‐calcium chloride quaternary systems were measured under various salt concentrations at 298.15 K and the results obtained were correlated with a modification of Hàla's model. Distribution of the salt between the two liquid phases was found to be strongly influenced by the content of methanol or ethanol while the solubility of the salt in the heptane or ethyl acetate rich phase was very small. The two‐liquid region, i.e. the miscibility gap was enlarged by adding the salt. Correlations of LLE data including the salt distribution for both the non‐aqueous and aqueous quaternary systems were possible with reasonable accuracy.