1. Separating Azeotropic Mixtures CHEN 4460 – Process Synthesis, Simulation and CHEN 4460 – Process Synthesis, Simulation and Optimization Dr. Mario Richard Eden Department of Chemical Engineering Auburn University Lecture No. 7 – Sequencing Separation of Azeotropic Mixtures October 10, 2005 Contains Material Developed by Dr. Daniel R. Lewin, Technion, Israel

2. Lecture 7 – Objectives  Be able to define the PFD for a heterogeneous azeotropic distillation system  Be able to define the PFD for a pressure swing distillation system

3. Product Compositions Regions For azeotropic systems –Shaded regions: Feasible distillate and bottoms product compositions Two binary azeotropes Three binary azeotropes and one ternary azeotrope

4. Heterogeneous Azeotropic Dist. Example: Dehydration of Ethanol Try toluene as an entrainer

5. Heterogeneous Azeotropic Dist. Example: Dehydration of Ethanol S1 S2 M1 D2 M2 D1

6. Pressure Swing Distillation

7. Example: Dehydration of Tetrahydrofuran (THF) T-x-y diagrams for THF and water

8. Summary – Azeotropic Sep.  Be able to define the PFD for a heterogeneous azeotropic distillation system  Be able to define the PFD for a pressure swing distillation system On completion of this part, you should:

9. Other Business Midterm Exam –October 17 during lecture (45 minutes) –Closed book! –Good luck! Next Lecture – October 24 –Heat and Power Integration (SSL pp. 302-346)