Process for preparing fluorinated C.sub.4 to C.sub.6 hydrocarbons and novel cyclic fluorinated hydrocarbons and their use as propellant gas and working fluid for heat pump systems
AssigneeBayer Aktiengesellschaft
InventorsDietmar Bielefeldt, Albrecht Marhold, Michael Negele
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Abstract
This invention relates to a process for preparing fluorinated C.sub.4 to C.sub.6 hydrocarbons by catalytically hydrogenating, in the presence of a base, at least partially halogenated olefins. This invention also relates to certain novel cyclic fluorinated C.sub.5 and C.sub.6 hydrocarbons prepared by the process of this invention. This invention further relates to the use of fluorinated C.sub.4 to C.sub.6 hydrocarbons as propellant gas or as working fluid for heat pump systems.
Claims10
A process for preparing a fluorinated C.sub.4 to C.sub.6 hydrocarbon of the formula ##STR7## wherein R.sub.f is CF.sub.3 or the two R.sub.f groups taken together are --CF.sub.2 --CF.sub.2 --, --CF.sub.2 --CF.sub.2 --CF.sub.2 --, or CH(CF.sub.3)--CH(CF.sub.3)--, comprising catalytically hydrogenating, in the presence of a base, an olefinic compound of the formula ##STR8## wherein X is hydrogen, fluorine, chlorine, or bromine;
- Y is fluorine, chlorine, or bromine;
- and
- R.sub.f is defined as above.
Dependencies are inferred from the claim text.