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:
Sep. 01, 2015
Filed:
Jun. 28, 2010
Applicants:
Olivier Buisine, Saint-genis Laval, FR;
Alessandro Chiovato, Anse, FR;
Inventors:
Olivier Buisine, Saint-genis Laval, FR;
Alessandro Chiovato, Anse, FR;
Assignee:
RHODIA OPERATIONS, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 51/347 (2006.01); C07C 67/10 (2006.01); C07C 51/09 (2006.01);
U.S. Cl.
CPC ...
C07C 67/10 (2013.01); C07C 51/09 (2013.01);
Abstract
A method for preparing difluoroacetic acid is described. The method can include: reacting a difluoroacetic acid ester with an aliphatic carboxylic acid which, after transesterification, results in the formation of difluoroacetic acid and the corresponding carboxylic acid ester, the carboxylic acid being selected such that the ester of the carboxylic acid has a lower boiling point than that of difluoroacetic acid; and removing the ester of the carboxylic acid by distillation as the ester forms, thus enabling the difluoroacetic acid to be recovered.