Page "Azeotrope" Paragraph 21

If the point, A had been chosen to the right of the azeotrope rather than to the left, the distillate at point C would be farther to the right than A, which is to say that the distillate would be richer in X and poorer in Y than the original mixture.

So in this case too, the distillate moves away from the azeotrope and the residue moves toward it.

This is characteristic of negative azeotropes.

No amount of distillation, however, can make either the distillate or the residue arrive on the opposite side of the azeotrope from the original mixture.

This is characteristic of all azeotropes.