Question: 1. A distillation column with a total condenser and a partial reboiler is separating a mixture of propane (P), n-butane (B), and n-hexane (H). The

1. A distillation column with a total condenser and a partial reboiler is separating a mixture of propane (P), n-butane (B), and n-hexane (H). The feed (a saturated vapor) is 20 mol\% propane, 35mol%n-butane, and 45mol%n-hexane. Feed rate is F=100kmol/h. We desire a 99% recovery of the n-butane in the distillate and a 98% recovery of n-hekane in the bottoms. CMO can be assumed to be valid. If we choose butane as the reference, the average relative volatilities are H2.04,H81.0,HB=0.20. Calculate the distillate flow rate D assuming all propane is in the distillate, and find the minimum external reflux ratio, Rmin

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