Preparation of Phenol

ChemistryAlcohols, Phenols And EthersFor JEE aspirants

PHENOL

These are organic compounds a hydroxyl group attached directly to a benzene ring.

Diagram being restored — will be back shortly

Preparation

Industrial Method

(i) From chloro benzene (Dow’s process)

Chlorobenzene is heated with NaOH at 673 K and under pressure of 300 atm to produced sodium phenoxide which on acidification yields phenol.

Diagram being restored — will be back shortly

(ii) Cumene Process

਌umene obtained from propene & benzene cumene on air oxidation followed by acidification with H₂SO₄ gives phenol & acetone.

Diagram being restored — will be back shortly

(iii) From benzene sulphonic acid

It is fused with NaOH gives sodium salt of phenol.

$C_{6} H_{5} S O_{3} H N a O H F u s i o n C_{6} H_{5} S O_{3} N a C_{6} H_{5} O N a H_{2} O^{+} / H^{+} C_{6} H_{5} O H$

(iv) From benzene diazonium chloride

This gives Ar SN1 reaction with H₂O to form phenol.

Diagram being restored — will be back shortly

Illustration 1. Starting from 1-methyl cyclohexene, prepare the following:

Diagram being restored — will be back shortly

Solution:

Diagram being restored — will be back shortly

Ready to master Alcohols, Phenols And Ethers?

Take a full mock test, practice concept-by-concept, and get an AI-powered rank prediction — all on Fundamenthol.