Preparation of tetrafluoroethylene
AssigneeE. I. Du Pont de Nemours and Company
InventorJames L. Webster
Life of this patent
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Abstract
Metal fluoride and carbon are fed to a plasma flame to form a gaseous reaction mixture which is quenched to form tetrafluoroethylene. The plasma flame can be formed from a non-reactive gas and the metal fluoride and carbon then become part of the plasma flame when fed into it. Alternatively, one of the reactants can form the plasma flame and then the other reactant is fed into it.
Claims21
The process for the manufacture of tetrafluoroethylene (TFE) comprising forming an extended turbulent plasma having an undefined portion, dissociating non-carbonaceous metal fluoride into a gaseous mixture of metal and reactive fluorine in the presence of carbon in the unconfined portion of said plasma to form a precursor to TFE, and quenching said precursor to obtain as a result thereof said TFE, said dissociating being carried out in the absence of halogen other than fluorine.
Process comprising contacting and reacting non-carbonaceous metal fluoride with carbon in an unconfined plasma flame to form a gaseous mixture which contains metal and the combination of fluorine and carbon which is capable of being quenched to form tetrafluoroethylene, said reacting being carried out in the absence of halogen other than fluorine.
Process of feeding non-carbonaceous metal fluoride and carbon to an unconfined plasma flame to form a gaseous reaction mixture which is capable of being quenched to form tetrafluoroethylene, and quenching said gaseous reaction mixture to obtain as a result thereof said tetrafluoroethylene, said feeding being carried out in the absence of halogen other than fluorine.
Dependencies are inferred from the claim text.