YA[ 1 1 B1

But, at any particular time during the distillation

Rearranging and integrating (assuming relative relativity is constant)

And, of course, a similar relationship can be developed for components A and C.

Example 5.5 A quantity of 100 moles of a mixture containing 50 mole percent benzene, 25 mole percent toluene, and 25 mole percent p-xylene is to be simply distilled until the residual benzene content in the still is reduced to 1.73 moles. Calculate the material balance for the separation.

From Eq. (5.31) with a = 2.90 for the benzene-toluene system and a = 6.94 for the benzene—p-xylene system, ln^=-1.16 25

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