Equilibrium data - boiling temperature for the system acetone(1) - methanol(2) at 760 mm Hg are given in the following table. A column is to be designed to separate a feed containing 25% mol acetone and 75% mol methanol into a distillate product with 75% mol acetone and a residual product with 3% mol acetone. The feed enters as an equilibrium mixture of 30% mol liquid and 70% mol vapor. A total condenser will be used, the reflux returns as saturated liquid and the residual product is removed from the reboiler. Using the McCabe-Thiele method, determine: (a) Minimum number of equilibrium stages at total reflux.

b) Minimum external reflux ratio. c) The number of equilibrium stages when using a reflux ratio twice the minimum value. d) The internal reflux ratios of the rectification and depletion sections. e) The temperature profile and compositions along the column. f) Temperatures at the dome and bottom of the column. g) Quantities of products per mole of feed. h) Amount of reflux and internal fluxes per mole of feed. Present the summary of results in a table.

Sistema acetona-metanol 'Azeotropo