Robert L Protzmann

US Patent:

48229164, Apr 18, 1989

Filed:

Sep 21, 1987

Appl. No.:

7/099265

Inventors:

Alan M. Aaronson - Flushing Meadows NY
Robert L. Protzmann - New City NY
John Tomko - Dobbs Ferry NY

Assignee:

Akzo America Inc. - New York NY

International Classification:

C07C14706

US Classification:

568 34

Abstract:

Diaryl sulfones are formed in a two-stage procedure. The first involves the reaction of an aryl sulfonic acid with an aryl reagent containing active hydrogen while by-product water is removed azeotropically. In the second stage, which contains unreacted sulfonic acid, is treated with a sulfone condensing agent and additional aryl reagent to react additional, unreacted aryl sulfonic acid from the first stage.