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:
Feb. 23, 2021
Filed:
Aug. 05, 2014
Applicant:
Solvay SA, Brussels, BE;
Inventors:
Heinz Rudi Feist, Issum, DE;
Werner Rudolph, Hannover, DE;
Assignee:
SOLVAY SA, Brussels, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/56 (2006.01); C07C 51/573 (2006.01);
U.S. Cl.
CPC ...
C07C 51/56 (2013.01); C07C 51/573 (2013.01);
Abstract
The present invention relates to a process for the preparation of halogenated carboxylic anhydrides, e.g. for the preparation of trifluoroacetic anhydride. The preparation is achieved by reacting a halogenated carboxylic acid, e.g. trifluoroacetic acid, with sulfuric acid, oleum and/or disulfuric acid.