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US 5,347,058 AGranted
Process for the production of fluorinated olefins
AssigneeE. I. Du Pont de Nemours and Company
InventorWilliam B. Farnham
Life of this patent
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Abstract
Fluorinated olefins are produced by thermolysis of a silyl ester of a fluorinated aliphatic carboxylic acid in the presence of a catalyst which provides fluoride ion, such as potassium fluoride. The fluorinated olefins are useful as monomers and chemical intermediates.
Claims16
A process for the production of fluorinated olefins, comprising, heating to a temperature of about 150.degree. C. to about 400.degree. C. a compound of the formula R.sup.1 R.sup.2 CFCR.sup.4 R.sup.5 C(O)OSiR.sup.3.sub.3, in the presence of a thermolysis catalyst, wherein:
- R.sup.1 and R.sup.2 are each independently fluorine, hydrocarbyl or substituted hydrocarbyl;
- R.sup.3 is hydrocarbyl, substituted hydrocarbyl, or oxysilyl;
- R.sup.4 is fluorine or perfluoroalkyl;
- and
- R.sup.5 is hydrogen or fluorine;
- and provided that when R.sup.4 is fluorine, said temperature is 200.degree. C. to 400.degree. C.
3 more elements
Dependencies are inferred from the claim text.