Appeal No. 95-1256
Application No. 08/043,917
infra and to take appropriate action.
Representative Claim
Claim 1 is representative of the subject matter on appeal and reads as follows:
1. A process for producing a compound of the formula RCFZH wherein R is
selected from the group consisting of SF5, CF2SF5 and RfCF2Y, wherein Rf is a
perfluoroalkylene group containing from 1 to about 12 carbon atoms and optionally
containing one or more ether oxygen atoms, Y is selected from the group consisting of H,
F and SF5, and Z is selected from the group consisting of F, CH3 and CF2CF3 comprising:
reacting an iodide compound of the formula R’CFZI with hydrogen at an elevated
temperature of about 4000C or less in the absence of metal-based hydrogenation catalysts,
wherein R’ is selected from the group consisting of SF5, CF2SF5 and RfCF2X and wherein
X is selected from the group consisting of H, F and SF5 and I, provided that when Y is F,
X is F, when Y is SF5, X is SF5 and when Y is H, X is H or I.
Background
As the representative claim indicates, the claimed invention is directed to the
production of hydrofluoro compounds containing carbon or carbon and sulfur atoms. In
particular, the “invention provides a process for producing monohydro and dihydro
compounds from corresponding monoiodo and diiodo compounds” (specification, p. 3,
lines 6-8) by way of a hydrogenolysis reaction “accomplished in the absence of
hydrogenation catalysts” (specification, p. 5, line 16).
Grounds of Rejection
2
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