Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1998-08-28
1999-11-16
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570156, C07C 1908, C07C 1725
Patent
active
059861517
ABSTRACT:
A process for the preparation of fluorinated propanes and propenes. CF.sub.3 CH.dbd.CH.sub.2 is produced from CF.sub.3 CH.sub.2 CHF.sub.2 by the sequential steps of dehydrofluorination, a reduction, and a second dehydrofluorination in which the same catalyst is preferably used for each step. Preferably the catalysts is palladium on carbon. The process provides the steps of passing CF.sub.3 CH.sub.2 CHF.sub.2 over a Pd/C catalyst to form CF.sub.3 CH.dbd.CHF; hydrogenating CF.sub.3 CH.dbd.CHF over a Pd/C catalyst to give CF.sub.3 CH.sub.2 CH.sub.2 F; and passing CF.sub.3 CH.sub.2 CH.sub.2 F over a Pd/C catalyst to give CF.sub.3 CH.dbd.CH.sub.2.
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Allied-Signal Inc.
Collazo Marie L.
Friedenson Jay P.
Siegel Alan
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