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:
Jul. 15, 2014
Filed:
May. 21, 2010
Michel Devic, Sainte Foy Les Lyon, FR;
Nicolas Doucet, Lyons, FR;
Laurent Wendlinger, Soucieu en Jarrest, FR;
Geraldine Cavallini, Saint-Symphorien d'Ozon, FR;
Pierre-marie Sedat, Fleurieux sur l'Arbresle, FR;
Karine Avril, Lyons, FR;
Michel Devic, Sainte Foy Les Lyon, FR;
Nicolas Doucet, Lyons, FR;
Laurent Wendlinger, Soucieu en Jarrest, FR;
Geraldine Cavallini, Saint-Symphorien d'Ozon, FR;
Pierre-Marie Sedat, Fleurieux sur l'Arbresle, FR;
Karine Avril, Lyons, FR;
Arkema France, Colombes, FR;
Abstract
The invention relates to a method for preparing fluoropropenes of formula (I) CFCF═CHR, where R is a hydrogen or a fluorine atom from at least one compound of formula (Ia) CFCF═CFR, where R has the same meaning as in formula (I), said method including the following steps: (i) hydrogenating at least one compound of formula (Ia) in an adiabatic reactor in the presence of a catalyst with a superstoichiometric amount of hydrogen so as to produce a hydrofluoropropane; (ii) partially condensing the flow from the adiabatic reactor of step (i) so as to produce a gaseous phase fraction, including unreacted hydrogen and a portion of the formed hydrofluoropropane, which is recirculated to step (i), and a liquid phase fraction including the residue of the hydrofluoropropane; (iii) dehydrofluorinating hydrofluoropropane from the liquid fraction of step (ii) using potassium hydroxide in an aqueous reaction medium contained in an agitated reactor so as to produce the fluoropropene of formula (I); and (iv) purifying the fluoropropene obtained in step (iii).