V8.4 Xiong Jieming Second Edition Tutorial: Problem of Separating Benzene from Water
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Propane separation from water: feed temperature of 90°C and 1.2 bar, with 2500 kmol/h of water and 60 kmol/h of propane； The column has 11 theoretical plates (excluding the condenser and reboiler); feed is applied to the first plate (above-stage), with a molar reflux ratio of 4.0. The pressure in the top condenser is 0.970 bar, and the pressure drop per plate is 0.007 bar. The liquid phase at the top of the column is removed at a rate of 60 kmol/h. Physical property method NRTL. Separation requirements: the molar fraction of propylene at the bottom of the reactor must be 0.0005, with a reflux ratio range of 2–10 (molar ratio) ； The molar fraction of water at the tower top reaches 0.04, and the flow rate of stream D is in the range of 40–70 kmol/h.
What question does the original poster want to ask? ? This example is on that page; I think I should take a look at it and try to solve it.