Question

The ethyl acetate/ethanol system forms an azeotrope at 54% ethyl acetate at P1. The composition of the azeotrope shifts to 38% ethyl acetate at P2 (See equilibrium data below) Vapor Mole Fraction, y (ethyl acetate) 1 0.9 P = P1 0.8 P = P2 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Liquid Mole Fraction, x (ethyl acetate) Your job is to separate a 100 mol/hour stream of 70% ethyl acetate and 30% ethanol into two streams that are 87% pure in each component. This system is a perfect candidate for pressure-swing distillation. The flow rate of the ethyl acetate-rich stream is specified at 60 mol/hour and the flow rate of the ethanol-rich stream is 5 mol/hour. Draw a fully-labeled process flow diagram of the two columns. Make sure to label the flowrates and compositions of all flowrates in the process (there should be 5 streams total) and also label the operating pressures of the columns.

          The ethyl acetate/ethanol system forms an azeotrope at 54% ethyl acetate at P1. The composition of the
azeotrope shifts to 38% ethyl acetate at P2 (See equilibrium data below)
Vapor Mole Fraction, y (ethyl acetate)
1
0.9
P = P1
0.8
P = P2
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Liquid Mole Fraction, x (ethyl acetate)
Your job is to separate a 100 mol/hour stream of 70% ethyl acetate and 30% ethanol into two streams that are 87% pure in
each component. This system is a perfect candidate for pressure-swing distillation. The flow rate of the ethyl acetate-rich
stream is specified at 60 mol/hour and the flow rate of the ethanol-rich stream is 5 mol/hour.
Draw a fully-labeled process flow diagram of the two columns. Make sure to label the flowrates and compositions of
all flowrates in the process (there should be 5 streams total) and also label the operating pressures of the columns.

The ethyl acetate/ethanol system forms an azeotrope at 54% ethyl acetate at P1. The composition of the
azeotrope shifts to 38% ethyl acetate at P2 (See equilibrium data below)
Vapor Mole Fraction, y (ethyl acetate)
1
0.9
P = P1
0.8
P = P2
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Liquid Mole Fraction, x (ethyl acetate)
Your job is to separate a 100 mol/hour stream of 70% ethyl acetate and 30% ethanol into two streams that are 87% pure in
each component. This system is a perfect candidate for pressure-swing distillation. The flow rate of the ethyl acetate-rich
stream is specified at 60 mol/hour and the flow rate of the ethanol-rich stream is 5 mol/hour.
Draw a fully-labeled process flow diagram of the two columns. Make sure to label the flowrates and compositions of
all flowrates in the process (there should be 5 streams total) and also label the operating pressures of the columns.

Added by Paula C.

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