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What are the by products produced in the manufacture of acrylonitrile from Propylene-ammonia-air oxidation process?

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What are the by products produced in the manufacture of acrylonitrile from Propylene-ammonia-air oxidation process?

(a) Cumene and acetone

(b) Cumene and acetonitrile

(c) Acetonitrile and hydrogen cyanide

(d) Cumene and hydrogen cyanide

I got this question by my school principal while I was bunking the class.

Origin of the question is C3 Compounds in section Synthetic Organic Chemical Industries of Chemical Technology

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The correct choice is (c) Acetonitrile and hydrogen cyanide

The best explanation: Hydrogen cyanide and acetonitrile are produced in the product stripper reactor which further goes into a purifying column. For one ton as basis around 0.09 and 0.08 tons of acetonitrile and hydrogen cyanide is produced respectively.

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