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We have a feed mixture of 22.0 mol% methanol, 47.0 mol% ethanol, 18.0 mol% n-propanol, and 13.0 mol% n-butanol. The feed is a saturated liquid, and F = 10,000 kmol/day. Recover 99.8% of methanol in distillate, and obtain a methanol mole fraction in distillate of 0.99.
a. Find D and B.
b. Find the compositions of distillate and bottoms.