Criconden(bar/therm) and Pb and Dew temperature

[Adria]

For a hydrocarbon mixture, the bubble point pressure at a certain isotherm was found to be equal to the cricondenbar, and the dew point temperature at a certain isobar was found to be equal to the crocondentherm.

Is this possible?

 

[25362]

Yes, it is possible at least for binary mixtures, or in approximately equimolar multicomponent mixtures as seen on P,T phase envelopes. On these the critical point, CP, of the isopleth lies in between the cricondenbar, CCB, and the cricondentherm, CCT.
As you know the CP is at the junction of the bubble- and dew-lines.

When the concentration of a light hydrocarbon is large relative to the other components of the system, as, for example, in critical solvent deashing, CSD, operations, or in most natural gases, the CP of the mixture moves away from the top of the loop, and to the left, approaching that of the pure light hydrocarbon, leaving the CCB and the CCT of the mixture, both on the right-hand side of the envelope, ie, on the dew point line.