QUESTION A multicomponent distillation operation is designed to separate a mixture of butane, pentane, hexane and heptane with composition of 30%, 25%, 30% and 15% respectively. The feed enters at a flowrate of 100 mole/h at 4 atm. The column is designed that 90 mol% of pentane is recovered in distillate and 90 mol% of hexane is recovered in the bottoms. Determine the a) composition of distillate and bottoms b) minimum number of stages assume top and bottom temperatures are 65C and 130C respectively. c) minimum reflux ratio d) number of theoretical stages given R= 1.35Rmin e) location of feed tray =