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13 Dec 2019

Acetic Acid reacts with ethanol to form ethyl acetate and water. The reaction is as follows: EtOH + AcOH yields EtOAc + H2O


The fresh feed to a reactor for the formation of ethyl acetate is comprised of two streams, acetic acid and ethanol, which are fed at a flow rate of 160 mol/min each. The effuent from the reactor contains EtOH, AcOH, EtOAc, and water. The effluent undergoes fractional distillation, and the reactants form a recycle which joins the fresh feed. The water is discarded, and the ethyl acetate is sent to a series of storage tanks. The k for the equlibrium expression is 0.23.


a) What is the flow rate of the recycle stream?

b)What kind of inputs would cause the balance to give impossible results?

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Related questions

A steady state process for converting ethylene to ethanol by reaction with water is to be designed.

Fresh feed of pure ethylene is mixed with a stream of water and then combined with a recycle stream. This combined stream is fed to a reactor. The ethylene reacts with water to produce ethanol. The combined stream to the reactor is such that water is present in 40% excess. As a result the single pass conversion in the reactor is 10%.

To separate the ethanol product, the exit stream from the reactor is sent to a distillation column. The bottoms stream from the column is a liquid solution of only water and ethanol with a mole fraction of ethanol of 0.95. 85% of ethanol fed to the column leaves in the bottoms stream. A second stream, the gaseous overhead from the column, forms the recycle that mixes with the fresh feed.

Draw a schematic of the process and solve the material balance for a process wherein the mass flow rate of ethanol in the liquid product from the column is 3.62 MTPD.

Determine the following:

Molar flow rate of fresh ethylene (mol/hr)
Molar flow rate of fresh water (mol/hr)
Molar flow rate of recycle (mol/hr)
Extent of reaction per unit time in the reactor (mol/hr)
Molar flow rate of water in the combined stream input to the reactor (mol/hr)
Molar flow rate of ethylene in the combined stream input to the reactor (mol/hr)
Overall conversion of water in the process

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