Lecture Notes 13 Part 1

Lecture Notes 13 Part 1 - ExtractionUnit Click to edit...

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Click to edit Master subtitle style 8/9/11 Extraction Unit Harrison Chapter 6 November 29 – December 3, 2010
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8/9/11 Where Does Extraction Fit Purification Polishing of  Final Product Crystallization Centrifugation Filtration Precipitation Chromatograph y Electrophoresis EXTRACTION EXTRACTION
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8/9/11 Basic Extraction Principles Reactant s Products Feed (x) Extract (y) Feed, x Extract, y
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8/9/11 Influences on K K = [ Extract ] [ Feed ] = [ y ] [ x ] K(                      )
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8/9/11 Tweaking K with pH RCOO H RCOO- H+ + K A = [H + ][RCOO - ] [RCOOH]
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8/9/11 Tweaking K with pH RCOO H RCOO- H+ + K A = [H + ][RCOO - ] [RCOOH] What is the Apparent Partition Coefficient? Heavy Phase (H) Light Phase (L) L H
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8/9/11 Tweaking K with pH K A = ][RCOO - ] [RCOOH] Heavy Phase (H) Light Phase L H K PC = L [RCOOH] + [RCOO - ] ( 29 H
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8/9/11 Tweaking K with pH K A = [H + ][RCOO - ] [RCOOH] Light Phase K PC = L [RCOOH] + [RCOO - ] ( 29 H
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8/9/11 pH Concept Question Light Phase A partially hydrolyzed sugar believed to be monoacidic is  extracted from water into an organic solvent. It has Kpc  values of 6.4 and 0.22mole/L at pH’s of 4.0 and 5.8  respectively.  What is the partition coefficient at a pH of 7.0?
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Lecture Notes 13 Part 1 - ExtractionUnit Click to edit...

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