We are required to reduce the DMF content of a feedstream containing 55 mol% DMF, the balance is nitrogen. A separator is designed such that exactly two-thirds of the Dimethy1 Formamide (DMF) fed to it will be obtained in pure form in one of the exit streams.

1. (20 points) Draw a PFD for the above and perform a degree of freedom analysis. Comment on whether all unknown variables in the PFD (flow rates and composi-tions) can be found
2. (8 points) Solve for the exit stream composition.
3. (2 points) Did you choose a basis?

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