Patent ID: 7560602
Filing Date: 2009-07-14
Classification: C07C

Abstract:
1. A process for the production of a fluorinated olefin comprising the steps of: (a) contacting a feed stream comprising a fluorinated olefin reactant having an N degree of fluorination and hydrogen with a first hydrogenation catalyst to convert a portion of said fluorinated olefin reactant to a first amount of a hydrofluorocarbon at a first conversion rate and to produce a first exit stream comprising said hydrofluorocarbon, an unreacted portion of said fluorinated olefin reactant and an unreacted portion of said hydrogen; (b) contacting said first exit stream with a second hydrogenation catalyst to convert a portion of said unreacted fluorinated olefin reactant to a second amount of said hydrofluorocarbon at a second conversion rate which is substantially greater than said first conversion rate; (c) dehydrohalogenating at least a portion of said first and second amounts of said hydrofluorocarbon in the presence of a dehydrohalogenation catalyst to produce a product stream comprising a fluorinated olefin product having an N−1 degree of fluorination and HF; and (d) optionally separating HF from said product stream.