An enrichment distillation tower, its fed with 45 mol% benzene (A) at 101.32 kPa absolute pressure and 100 kgmol / hour saturated steam containing 55 mol% toluene (B). The distillate will contain 85 mol% and the base 25 mol% benzene. Reflux rate is set to 4.0: 1  a)Find distilled D and base W in kg / hr. b)Calculate the theoretical number of racks required. c)Find the minimum reflux rate Rm.

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