Cumene (C6H5C3H7) is produced by reacting benzene with propylene [A H; = -39,520 Btu] (See footnote 1 p. 495). Propylene Butane Benzene Tr (°F) HEAT EXCHANGER REACTOR DISTILLATION TI T2 COLUMNS 200°F Propylene Butane 77°F +77°F Cumene Benzene 77°F A liquid feed containing 85.0 mole% propylene and 15.0% n-butane and a second liquid stream containing essentially pure benzene are fed to the reactor. Fresh benzene and recycled benzene, both at 77°F, are mixed in a 1:2.5 ratio (1 mole fresh feed/2.5 moles recycle) and passed through a heat exchanger, where they are heated by the reactor effluent before being fed to the reactor. The reactor effluent enters the exchanger at 350.0°F and leaves at 200.0°F. The pressure in the reactor is sufficient to maintain the effluent stream as a liquid. After being cooled in the heat exchanger, the reactor effluent is fed to a distillation column (T1). All of the butane and unreacted propylene are removed as overhead product from the column, and the cumene and unreacted benzene are removed as bottoms product and fed to a second distillation column (T2) where they are separated. The benzene leaving the top of the second column is the recycle that is mixed with the fresh benzene feed. Of the propylene fed to the process, 20.0% does not react and leaves in the overhead product from the first distillation column. The production rate of cumene is 1200.0 lbm/h.
Cumene (C6H5C3H7) is produced by reacting benzene with propylene [A H; = -39,520 Btu] (See footnote 1 p. 495). Propylene Butane Benzene Tr (°F) HEAT EXCHANGER REACTOR DISTILLATION TI T2 COLUMNS 200°F Propylene Butane 77°F +77°F Cumene Benzene 77°F A liquid feed containing 85.0 mole% propylene and 15.0% n-butane and a second liquid stream containing essentially pure benzene are fed to the reactor. Fresh benzene and recycled benzene, both at 77°F, are mixed in a 1:2.5 ratio (1 mole fresh feed/2.5 moles recycle) and passed through a heat exchanger, where they are heated by the reactor effluent before being fed to the reactor. The reactor effluent enters the exchanger at 350.0°F and leaves at 200.0°F. The pressure in the reactor is sufficient to maintain the effluent stream as a liquid. After being cooled in the heat exchanger, the reactor effluent is fed to a distillation column (T1). All of the butane and unreacted propylene are removed as overhead product from the column, and the cumene and unreacted benzene are removed as bottoms product and fed to a second distillation column (T2) where they are separated. The benzene leaving the top of the second column is the recycle that is mixed with the fresh benzene feed. Of the propylene fed to the process, 20.0% does not react and leaves in the overhead product from the first distillation column. The production rate of cumene is 1200.0 lbm/h.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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![Cumene (C6H5C3H7) is produced by reacting benzene with propylene [A H; = -39,520 Btu] (See footnote 1 p. 495).
Propylene
Butane
Benzene
Tr (°F)
НЕАТ
REACTOR
EXCHANGER
DISTILLATION
T1
T2
COLUMNS
200°F
Propylene
Butane
77°F
77°F
Cumene
Benzene
77°F
A liquid feed containing 85.0 mole% propylene and 15.0% n-butane and a second liquid stream containing essentially pure benzene
are fed to the reactor.
Fresh benzene and recycled benzene, both at 77°F, are mixed in a 1:2.5 ratio (1 mole fresh feed/2.5 moles recycle) and passed
through a heat exchanger, where they are heated by the reactor effluent before being fed to the reactor.
The reactor effluent enters the exchanger at 350.0°F and leaves at 200.0°F. The pressure in the reactor is sufficient to maintain the
effluent stream as a liquid.
After being cooled in the heat exchanger, the reactor effluent is fed to a distillation column (T1). All of the butane and unreacted
propylene are removed as overhead product from the column, and the cumene and unreacted benzene are removed as bottoms
product and fed to a second distillation column (T2) where they are separated.
The benzene leaving the top of the second column is the recycle that is mixed with the fresh benzene feed. Of the propylene fed to
the process, 20.0% does not react and leaves in the overhead product from the first distillation column.
The production rate of cumene is 1200.0 lbm/h.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffae127e2-b2d0-4b22-9c86-ab52f63503ac%2F5c8dfc97-3874-4a2e-9313-6cf7ea09e6fa%2Fujyszft_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Cumene (C6H5C3H7) is produced by reacting benzene with propylene [A H; = -39,520 Btu] (See footnote 1 p. 495).
Propylene
Butane
Benzene
Tr (°F)
НЕАТ
REACTOR
EXCHANGER
DISTILLATION
T1
T2
COLUMNS
200°F
Propylene
Butane
77°F
77°F
Cumene
Benzene
77°F
A liquid feed containing 85.0 mole% propylene and 15.0% n-butane and a second liquid stream containing essentially pure benzene
are fed to the reactor.
Fresh benzene and recycled benzene, both at 77°F, are mixed in a 1:2.5 ratio (1 mole fresh feed/2.5 moles recycle) and passed
through a heat exchanger, where they are heated by the reactor effluent before being fed to the reactor.
The reactor effluent enters the exchanger at 350.0°F and leaves at 200.0°F. The pressure in the reactor is sufficient to maintain the
effluent stream as a liquid.
After being cooled in the heat exchanger, the reactor effluent is fed to a distillation column (T1). All of the butane and unreacted
propylene are removed as overhead product from the column, and the cumene and unreacted benzene are removed as bottoms
product and fed to a second distillation column (T2) where they are separated.
The benzene leaving the top of the second column is the recycle that is mixed with the fresh benzene feed. Of the propylene fed to
the process, 20.0% does not react and leaves in the overhead product from the first distillation column.
The production rate of cumene is 1200.0 lbm/h.
Transcribed Image Text:Calculate the molar flow rates of each species entering and leaving the whole process and the reactor.
Overall Process
Reactor
In
(Ib-mol/h)
Out
In
Out
(Ib-mol/h)
(Ib-mol/h)
(Ib-mol/h)
C3H6
i
i
12.5
C4H10
i
C6H6
C9H12
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