General methods of preparation of phenols are described below:
Preparation of phenol From benzene sulphonic acid:
Preparation of phenol From haloarenes:
Preparation of phenol From diazonium salt:
Phenol is prepared commercially by the cumene-phenol process in which cumene (isopropylbenzene) is oxidised to cumene hydroperoxide which on treating with dilute acid yields phenol and acetones.
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