class 9 - Class 9 Non Ideal Separation Trains What do we do...

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Non Ideal Separation Trains Class 9
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What do we do now ? (ordinary distillation doesn‘t work)
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Types of Separations If ordinary distillation is too expensive to separate liquid mixtures, i.e. α < 1.1, the other choices that are normally the next least expensive include: Extraction Extractive distillation Azeotropic distillation Reactive distillation Crystallization Adsorption Reaction Membrane However, in most cases, these separation procedures require multiple distillation columns to replace a conventional distillation, and so they are normally more expensive
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Extraction Separating a mixture of B and C using a counter-current solvent S feed pure C pure B pure S Same B-C distillation required for C, although degree of separation reduced
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Extractive Distillation Heavy component added near top of column (extractive entrainer)
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Azeotropic Distillation Light component S - rich (taken overhead) (taken overhead) (recycled)
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Reactive Distillation meta- para- sodium cumene (an entrainer that reacts with para-isomer)
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Crystallization (use the difference in freezing points to separate components In a mixture)
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What is an azeotrope? Minimum Boiling Azeotrope
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This note was uploaded on 11/14/2011 for the course CHEN 4520 taught by Professor Wiemer during the Fall '11 term at Colorado.

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class 9 - Class 9 Non Ideal Separation Trains What do we do...

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