Patent ID: 8513458

Claim:
A method for producing carbonyl fluoride, comprising: introducing a tetrafluoroethylene gas component comprising a mixture of a purified tetrafluoroethylene gas, wherein the purified tetrafluoroethylene gas has a purity concentration of 90% or more, and a diluent selected from chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), perfluorocarbons (PFCs), or hydrofluorocarbons (HFCs), or an unpurified tetrafluoroethylene gas composition comprising a reaction by-product generated during production of the unpurified tetrafluoroethylene gas, wherein the content of tetrafluoroethylene in said tetrafluoroethylene gas component is greater than the contents of other components of the tetrafluoroethylene gas component at a molar ratio of more than 1/10, into a reactor, in the absence of oxygen difluoride, together with oxygen gas in a molar amount of 0.9 to 5 times the molar amount of tetrafluoroethylene in said tetrafluoroethylene as component; and then heating the obtained mixture for reaction.