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:
Jun. 17, 2014
Filed:
Nov. 22, 2011
Sudip Mukhopadhyay, Williamsville, NY (US);
Hsueh S. Tung, Getzville, NY (US);
Michael Van Der Puy, Amherst, NY (US);
Daniel C. Merkel, Orchard Park, NY (US);
Jing Ji MA, West Seneca, NY (US);
Cheryl L. Bortz, N. Tonawanda, NY (US);
Barbara A. Light, Niagara Falls, NY (US);
Steven D. Phillips, Buffalo, NY (US);
Rajesh K. Dubey, Williamsville, NY (US);
Sudip Mukhopadhyay, Williamsville, NY (US);
Hsueh S. Tung, Getzville, NY (US);
Michael Van Der Puy, Amherst, NY (US);
Daniel C. Merkel, Orchard Park, NY (US);
Jing Ji Ma, West Seneca, NY (US);
Cheryl L. Bortz, N. Tonawanda, NY (US);
Barbara A. Light, Niagara Falls, NY (US);
Steven D. Phillips, Buffalo, NY (US);
Rajesh K. Dubey, Williamsville, NY (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CFCF═CH(1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCl═CClCHCl is fluorinated to synthesize a compound such as CFCCl═CH. The CFCCl═CHis preferably converted to CFCFClCH(244-isomer) using a SbClas the catalyst which is then transformed selectively to 1234yf. For the first step, a mixture of CrOand FeCl/C is preferably used as the catalyst to achieve high selectivity to CFCCl═CH(96%). In the second step, SbCl/C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CFCFClCH. The intermediates are preferably isolated and purified by distillation and used in the next step without further purification, preferably to a purity level of greater than about 95%.