Process for the preparation of fluorinated alkanes from alkenes

Details Process for the preparation of fluorinated alkanes from alkenes Process for the preparation of fluorinated alkanes from alkenes

1988-12-27

1990-06-26

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570134, 570172, C07C 1702, C07C 1704, C07C 1902, C07C 1706

Patent

active

049373986

ABSTRACT:
The present invention provides a process for the preparation of luorinated alkanes. The process comprises the step of: reacting an alkene with carbon having fluorine absorbed therein at a temperature and for a time sufficient to form fluorinated alkanes. The alkene used is not perhalogenated at the double-bonded carbons. Preferably, the alkene used is vinylidene fluoride or ethylene.
The process produces products such as 1,1,1,2-tetrafluoroethane (known in the art as 134a) which may be used as a refrigerant and 1,1,1-trifluoroethane (known in the art as R143a) and 1,2-difluoroethane (known in the art as R152) which may be used as blowing agents or solvents.

REFERENCES:
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R. Merritt "Direct Fluorination of 1,1-Diphenylethylene", J. Org. Chem. 31, 3871 (1966).
N. Watanabe et al., "Some Properties of Fluorine-Adsorbed Active Carbon", Bull Chem. Soc. Jpn. 54, 127 (1981).

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