Advertisements
Advertisements
Question
Write a preparation of phenol from cumene? What happens when phenol is heated with zinc dust?
Solution
a. Preparation of phenol from cumene:
1. When an alkaline solution of cumene ( isopropylbenzene or 2-phenylpropane) in sodium carbonate is oxidised by passing air or oxygen in the presence of cobalt naphthenate as a catalyst at 423 K, cumene hydroperoxide is obtained.
2. Auto oxidation:
Cumene hydroperoxide on heating with dilute H2SO4 decomposes forming phenol and acetone.
In this method, acetone is obtained as an important byproduct which is separated by distillation.
b. Heating of phenol with zinc dust:
When phenol is heated with zinc dust, benzene is formed.
APPEARS IN
RELATED QUESTIONS
How is carbolic acid prepared from the given compounds :
Aniline
What is the action of bromine water on carbolic acid?
How is phenol prepared from cumene?
How is carbolic acid prepared from the given compounds :
Chlorobenzene and steam at 698K?
Isopropylbenzene on air oxidation followed by decomposition by dilute acid gives ______.
Write preparation of phenol from aniline.
Write Dow process for the preparation of Phenol.
Write the name of reactant used for preparation of phenol, which is given by product used as solvent.
How is phenol (carbolic acid) prepared from aniline (diazotization)?
