Abstract
(Liquid + liquid) equilibrium tie-lines were measured for the two quaternary systems {x1H2O +x2C2H5OH +x3CH3C(CH3)2OCH3+ (1 −x1−x2−x3)C6H5CH3} and {x1H2O +x2C2H5OH +x3CH3CH2C(CH3)2OCH3+ (1 −x1−x2−x3)C6H5CH3} at T= 298.15 K and po= 101.3 kPa. The experimental (liquid + liquid) equilibrium results have been satisfactorily correlated by modified and extended UNIQUAC models both with ternary and quaternary parameters in addition to binary ones.
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