Five hundred lbmol of 48.8 mol% A and 51.2 mol% B with a relative volatility α A,B of 2.0 is separated in a batch rectifier
Five hundred lbmol of 48.8 mol% A and 51.2 mol% B with a relative volatility α A,B of 2.0 is separated in a batch rectifier consisting of a total condenser, a column with seven theoretical stages, and a still-pot. The reflux ratio is varied to maintain the distillate at 95 mol% A. The column operates with a vapor boilup rate of 213.5 lbmol/h. The rectification is stopped when the mole fraction of A in the still is 0.192. Determine the (a) rectification time and (b) total amount of distillate produced.
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