Feasible Splits for Ideal Mixtures

At some boundary values of the parameter D/F, at which it is equal to the concentration of the lightest component or to the sum of concentrations of a few light components in the feeding, we have sharp separation without distributed component and at other values of the parameter D/Fv/e have sharp separation with one distributed component. These are sharp splits without distributed components 1 2,3,4 1,2 3,4 1,23 4 (here and further the components of the top product are shown before the colon and those of the bottom product follow the colon). 

In the case of sharp separation of ideal mixture without distributed components, the initial mixture is separated into two different groups of components the top product components and the bottom product components. The heaviest component among the top product components is called the light key component and the lightest component among bottom product components is called the heavy key component. The light and the heavy key components neighbour in volatihty. 

Splits with the number of distributed components bigger than one at R = 00 and N = oo are impossible (e.g., for four-component mixture, the split 1,2,3 2,3,4 with two distributed components is impossible). 

At an arbitrary location of the point xp, any point of edges 1-2 and 3-4 and any point of faces 1-2-3 and 2-3-4 (Fig. 3.4) can be top or bottomry product point. Further, we call the set of possible product points in each of the boundary 

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