The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 1990
Filed:
Aug. 23, 1988
Applicant:
Inventors:
Ulrich A Steiner, North Plainfield, NJ (US);
Walter T Reichle, Warren, NJ (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568 34 ;
Abstract
An improvement in processes for preparing diaryl sulfones comprising adding a limited amount of water to the reaction product mixture of such processes to form a heavier aqueous phase containing unreacted monosubstituted benzene sulfonic acid with less than an equal amount of water, separating the aqueous phase, and dehydrating the aqueous phase to recover the unreacted sulfonic acid for forming additional diaryl sulfone.