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US 5,532,419 AGranted
Processes for the preparation of fluorinated olefins and hydrofluorocarbons using fluorinated olefin
AssigneeAlliedSignal Inc.
InventorsMichael Van Der Puy, G. V. Bindu Madhavan, Alagappan Thenappan, Hsueh S. Tung
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Abstract
The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF.sub.2 CH.dbd.CH.sub.2 where R is C.sub.x Cl.sub.y F.sub.z and y+z=2x+1. The invention is also directed to a practical process for converting these olefins to hydrofluorocarbons via the catalyzed fluorination with hydrogen fluoride. Hydrofluorocarbons produced via this process have application as solvents among other uses.
Claims10
A process for preparing a hydrofluorocarbon comprising:
- a) reacting a compound of the formula RCF.sub.2 CH.dbd.CH.sub.2 where R is C.sub.x Cl.sub.y F.sub.z and y+z=2x+1 with hydrogen fluoride in the presence of an antimony (V) halide catalyst under conditions sufficient to produce a compound of the formula RCF.sub.2 CH.sub.2 CH.sub.2 F where R is C.sub.x Cl.sub.y F.sub.z and y+z=2x+1;
- and
- b) recovering a compound of the formula RCF.sub.2 CH.sub.2 CH.sub.2 F where R is C.sub.x Cl.sub.y F.sub.z and;
- y+z=2x+1.
1 more element
Dependencies are inferred from the claim text.