Ternary and quaternary liquid-liquid equilibria for fuel additives of the water + methanol + toluene and water + methanol + toluene + methyl tert-butyl ether or tert-amyl methyl ether systems at 298.15 K

Experimental tie-line data of two quaternary mixtures for water + methanol + toluene + methyl tert-butyl ether and water + methanol + toluene + tert-amyl methyl ether systems and those of one constituent ternary mixture for the water + methanol + toluene system, measured at a temperature of 298.15K and ambient pressure, are presented. The experimental ternary and quaternary liquid−liquid equilibrium data have been satisfactorily correlated by using a modified form of the UNIQUAC model including multibody interaction parameters in addition to binary ones. The results are further compared with those obtained by the extended UNIQUAC model published previously.

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