A distillation column with 10 stages, a partial reboiler, and a total condenser is used to separate this ternary mixture. The column operates at atmospheric pressure (i.e., ). The feed used the following compositions:

Case 1: water, -propanol, and acetone.

Case 2: water, -propanol, and acetone.

The feed flow rate is and the feed location is stage , counting from the top. You can select the value of the vapor fraction of the feed stream, , where is the feed quality.

The distillation composition profile for either case is given by selecting the appropriate tab. The straight magenta line represents the overall column mass balance. The magenta dot gives the feed location. Both cases indicate that the profile is either in one region or the other of the two regions that are separated by the distillation frontier (shown in brown). As expected, no crossing of the frontier is allowed. The distillate stream is almost pure acetone (with a boiling point equal to C) and the residue (or bottom stream) is composed of essentially a mixture of a water and -propanol. For both distillation cases, the reflux and reboil ratios are and . The composition profile was checked against results from Aspen HYSYS and perfect agreement was found. This is expected since the method is rigorous and solves the MESH equations using Mathematica's built-in command FindRoot.