Perfluoropropene pyrolysis

The decomposition products, up to a temperature of 500°C, are principally the monomer, tetrafluoroethylene, but also include perfluoropropene, other perfluro compounds containing four or five carbon atoms, and an unidentified particulate waxy fume. From 500°C to 800°C, the pyrolysis product is carbonyl fluoride, which can hydrolyze to form HE and CO2. 

Dresdner et al found the products of perfluoroethyl ether pyrolysis at 800 °C to be perfluoroethane, carbonyl fluoride, perfluoropropane, perfluoropropene, perfluoroisobutene and carbon. 

When the dihalocarbene is generated thermally or photochemically the product of cheletropic addition to the alkyne is usually isolable in adequate yield. For example, pyrolysis of (trichloromethyl)trifluorosilane at 140°C and 6.5 atm in the presence of perfluorobut-2-yne provides " 3,3-dichloro-l,2-bis(trifluoromethyl)cyclopropene in 93 % yield. The corresponding perfluorocyclopropene is available from addition of di-fluorocarbene which can be generated by thermolysis of perfluoropropene oxide ... 

The kinetics of the thermal decomposition of 1,1,1-trifluoroacetone have been studied, both in the presence and absence of foreign gases (e.g., nitric oxide, propene, perfluoropropene). The following reactions were written to account for the predominant products from pyrolysis of the ketone alone at 547 °C and initial pressure 106 mmHg ... 

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