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. 30, 2016
Filed:
Jul. 03, 2013
Applicant:
Arkema France, Colombes, FR;
Inventors:
Anne Pigamo, Francheville, FR;
Bertrand Collier, Saint-Genis-Laval, FR;
Joaquin Lacambra, Vernaison, FR;
Assignee:
ARKEMA FRANCE, Colombes, Frances, unknown;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/20 (2006.01); B01J 19/18 (2006.01); B01J 19/00 (2006.01); B01J 19/02 (2006.01); B01J 19/24 (2006.01);
U.S. Cl.
CPC ...
C07C 17/206 (2013.01); B01J 19/0066 (2013.01); B01J 19/02 (2013.01); B01J 19/18 (2013.01); B01J 19/24 (2013.01); B01J 2219/00006 (2013.01); B01J 2219/0277 (2013.01); B01J 2219/24 (2013.01); Y02P 20/582 (2015.11);
Abstract
A method for producing difluoromethane, including the catalytic reaction of dichloromethane with hydrogen fluoride in the liquid phase, in the presence of chlorine, and in the presence of an ionic liquid catalyst consisting of the product of the reaction of antimony pentachloride with an organic salt having the general formula X+A, where A is a halide anion or hexafluoroantimonate, and X+ is a quaternary ammonium cation, quarternary phosphonium or ternary sulfonium. Further, equipment suitable for implementing said method.