MULTIPHASE EQUILIBRIUM BEHAVIOR OF THE MIXTURE ETHANE PLUS 1-DECANOL PLUS N-DOCOSANE

The phase equilibrium behavior of the liquid-liquid-vapor (llg) region of the mixture ethane + 1-decanol + n-docosane was examined. This ter nary system was studied experimentally using visual-cell stoichiometri c techniques with pressure discrimination of +/-0.01 bar, accomplished by using a cell pressure transducer in conjunction with a dead-weight gauge. The three-phase region was located between the llg loci of the binary mixtures ethane + 1-decanol and ethane + n-docosane and bounde d below by a lower critical end point (l = l-g) locus and above by an upper critical end point (l-l = g) locus. Phase compositions and molar volumes are reported for the two liquid phases along the 298.15 and 3 04.15 K isotherms. Separabilities between the liquid phases of the two solutes are presented and discussed for the two isotherms.