Question

We ar e separating a mi xture of 40 mol% iso-pentane, 30% n-hexane, and 30% n-h eptane

fed into the distil la tion col umn at the fe ed ra te of 1,000kmol/h. We desire a 98 m ol%

recove ry of n-he xane in the bottom prod uct and a 99% recoveryof iso-pentane in the

distillate. The feed is a two-phase mixtur e with 40% vapour,and the reflux ratio

L/D=2.5

6.1) Find D and B

6.2) Find co mpositions of distillate and bottom products

6.3) Calculate the values of L , V , L , and V , assuming thatCMO is valid