Question

A novice manufacture of alcohol for gasohol is having a bit difficulty with a distillation column. The operation is shown in figure. Too much alcohol is lost in the bottoms (waste). Calculate the composition of the bottoms and the weight of alcohol lost in the bottoms.

System
Boundary
Cooling
Water
Vapor
Heat
Exchanger
Reflux
Distillate (Product) P?
60% EtOH
40% H2O
Wt 1/10 feed
1000 kg Feed
Distillation
Column
F 10% EtOH
90% H2O
Bottoms (Waste) B-?
EtOH?
H20?
Heat

Image Transcription

System Boundary Cooling Water Vapor Heat Exchanger Reflux Distillate (Product) P? 60% EtOH 40% H2O Wt 1/10 feed 1000 kg Feed Distillation Column F 10% EtOH 90% H2O Bottoms (Waste) B-? EtOH? H20? Heat

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