4460 Lab Lecture 3 2011

4460 Lab Lecture 3 2011 - CHEN 4460 Process Synthesis,...

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Unformatted text preview: CHEN 4460 Process Synthesis, Simulation and Optimization Dr. Mario Richard Eden Department of Chemical Engineering Auburn University Lab Lecture No. 3 Sequencing of Azeotropic Distillation Columns October 4, 2011 Contains Material Developed by Dr. Daniel R. Lewin, Technion, Israel Azeotropic Distillation Introduction When two or more components differ in boiling by less than approximately 50 C and form a nonideal liquid solution , the relative volatility may be below 1.10. Then ordinary distillation may be uneconomic, and if an azeotrope forms even impossible. In that event, the following separation techniques, referred as enhanced distillation by Stichlmair, Fair, and Bravo, should be explored: Extractive distillation Salt distillation Pressure-swing distillation Homogeneous azeotropic distillation Heterogeneous azeotropic distillation Reactive distillation Example 1 Given that methyl acetate ( 1 ), which boils at 57.8 C, methanol ( 2 ), which boils at 64.7 C and n-hexane ( 3 ), which boils at 68.7 C. A. Sketch any boundaries across which the residue curves cannot traverse. B. Sketch the residue curves for three feed compositions: Mole Fractions Component I II III 1 0.70 0.15 0.15 2 0.15 0.70 0.15 3 0.15 0.15 0.7 Example 1 Note the existence of four azeotropes , where compositions are in mol %:...
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This note was uploaded on 12/05/2011 for the course CHEM 4460 taught by Professor Eden during the Fall '11 term at Auburn University.

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4460 Lab Lecture 3 2011 - CHEN 4460 Process Synthesis,...

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