A saturated-liquid mixture of 70 mol% benzene and 30 mol% toluene, whose relative volatility is 2.5, is to be distilled at 1 atm to produce a distillate of 80 mol% benzene. Three procedures, described below, are under consideration. For each procedure, calculate and tabulate: (a) moles of distillate per 100 moles of feed, (b) moles of total vapor generated per mole of distillate, and (c) mol% benzene in the bottoms. (d) for each part, construct a y-x diagram. On this, indicate the composition of the overhead product, the reflux, and the composition of the bottoms. Continuous distillation in a column containing one equilibrium plate. The feed is sent to the direct-heated still, from which residue is withdrawn continuously. The vapors from the plate enter the top of a helically coiled partial condenser that discharges into a trap. The liquid from the trap is returned to the plate, while the uncondensed vapor is condensed to form a distillate containing 80 mol% benzene. The molar ratio of reflux to product is 0.5
A saturated-liquid mixture of 70 mol% benzene and 30 mol% toluene, whose relative volatility is
2.5, is to be distilled at 1 atm to produce a distillate of 80 mol% benzene. Three procedures,
described below, are under consideration. For each procedure, calculate and tabulate: (a) moles of
distillate per 100 moles of feed, (b) moles of total vapor generated per mole of distillate, and (c)
mol% benzene in the bottoms. (d) for each part, construct a y-x diagram. On this, indicate the
composition of the overhead product, the reflux, and the composition of the bottoms.
Continuous distillation in a column containing one equilibrium plate. The feed is sent to
the direct-heated still, from which residue is withdrawn continuously. The vapors from the
plate enter the top of a helically coiled partial condenser that discharges into a trap. The
liquid from the trap is returned to the plate, while the uncondensed vapor is condensed to
form a distillate containing 80 mol% benzene. The molar ratio of reflux to product is 0.5
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