500 kmol\h of a liquid mixture of light alcohols containing. By moles, 40% methanol (M), 35% ethanol (E), isopropanol (IP), and 10% normal propanol (NP) is distilled in a sequence of two distillaation columns. The distillate from the first column is 98% pure (M) with a 96% recovery of (M). The distillate from the second column is 92% pure (E) with a 95% recovery of (E) from the process feed.


Assume no propanols in the distillate from column C1, no (M) in the bottoms from column C2, and no normal propanol in the distillate from column C2.

1. By material balances, assuming negligible propanols in the distillate from the first column, compute the flow rates in kmol/h of each component in each feed, distillate, and bottoms, Draw a labeled block-flow diagram. Include the results of the material balances in a table and place the table below your block-flow diagram.