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:
Oct. 07, 2014
Filed:
Mar. 07, 2011
Applicants:
Patrick Deck, São Paulo, BR;
Heiner Schelling, Kirchheim, DE;
Florian Garlichs, Neustadt, DE;
Inventors:
Assignee:
BASF SE, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 315/00 (2006.01); C07C 303/22 (2006.01);
U.S. Cl.
CPC ...
C07C 303/22 (2013.01); C07C 315/00 (2013.01);
Abstract
Processes for preparing 4-chlorobenzenesulfonic acid from 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid, which processes include the conversion of 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid to 4-chlorobenzenesulfonic acid in the presence of sulfuric acid at a temperature of 100 to 300° C.; as well as processes for preparing 4,4'-dichlorodiphenyl sulfone, which include such described processes for preparing 4-chlorobenzenesulfonic acid.