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:
Aug. 18, 2020
Filed:
Jun. 09, 2016
Applicant:
Vertellus Holdings Llc, Indianapolis, IN (US);
Inventors:
Ramiah Murugan, Indianapolis, IN (US);
David A. Hay, Indianapolis, IN (US);
Assignee:
Vertellus Holdings LLC, Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 315/00 (2006.01); C07C 303/06 (2006.01); B01J 23/745 (2006.01); B01J 21/02 (2006.01); B01J 21/06 (2006.01); B01J 23/06 (2006.01); B01J 23/18 (2006.01); B01J 31/02 (2006.01);
U.S. Cl.
CPC ...
C07C 315/00 (2013.01); B01J 21/02 (2013.01); B01J 21/066 (2013.01); B01J 23/06 (2013.01); B01J 23/18 (2013.01); B01J 23/745 (2013.01); B01J 31/0215 (2013.01); B01J 31/0258 (2013.01); C07C 303/06 (2013.01);
Abstract
A process for preparing diaryl sulfones, such as 4,4'-dichlorodiphenylsulfone is disclosed. The process comprises contacting an aryl compound with sulfur trioxide to provide a benzene sulfonic acid. The benzene sulfonic acid is coupled to additional aryl compound in the presence of a catalyst. During the coupling step, the additional aryl compound is continuously added while water is removed.