Mass balance
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The concentration of isobutene in the overhead product is 4.8 mole %, and the concentration of propane in the bottoms is 0.7 mole %. Calculate the moles of the various components in the overhead and bottoms per 100 moles of feed.
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Solution Summary
This problem shows how to calculate moles in various parts of a distillation process.
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The following feed to a distillation column is separated into an overhead product that contains nothing boiling higher than isobutene and bottoms that contain nothing boiling lower than propane.
Feed Component Mole %
Ethylene 1.9
Ethane 2.1
Propylene 5.2
Propane 14.8
Isobutane 25.0
n-Butane 34.0
n-Pentane 17.0
100.0
The concentration of isobutene in the overhead product is 4.8 mole %, and the concentration of propane in the bottoms is 0.7 mole %. Calculate the moles of the various components in the overhead and bottoms per 100 moles of feed.
Solution.
Overhead, concentration of Isobutane, 4.8 mol %
Ethylene 1.9, mol %
Ethane, 2.1 ...
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