p-Chlorobenzenesulfonic acid → 4,4'-Dichlorodiphenyl sulfone

HRID 2108244Notes

Reaction equation

HRID 2108244 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([OH:11])(=[O:10])=O)=[CH:4][CH:3]=1>ClC1C=CC=CC=1>[CH:6]1[C:5]([S:8]([C:5]2[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=2)(=[O:10])=[O:11])=[CH:4][CH:3]=[C:2]([Cl:1])[CH:7]=1

Participants

3

Reactant 1

HCID 7400p-Chlorobenzenesulfonic acid

Product 1

HCID 66254,4'-Dichlorodiphenyl sulfone

Reagents, catalysts & solvents 1

HCID 7964ChlorobenzeneSolvent

Procedure

In this improved process, p-chlorobenzene sulfonic acid is partially converted in a counter-current reaction system with monochlorobenzene to form 4,4'-dichlorodiphenyl sulfone. The unconverted sulfonic acid is separated from the crude sulfone product with a minor amount of water and the aqueous acid is dehydrated and then returned to the reaction zone to form additional 4,4'-dichlorodiphenyl sulfone.

Sources & evidence

ORD record
ord-3c5ff3d6c07446edad03f8421e56b12d
Source dataset
uspto-grants-1990_06
Patent number
US04937387

Reaction notes

Loading…