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

Participants

Reaction Steps

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.

Provenance & Evidence