Process for the preparation of perfluorocarbons
AssigneeE. I. Du Pont de Nemours and Company
InventorJames Lang Webster
Life of this patent
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Abstract
Tetrafluoroethylene and other valuable 2-carbon atom fluorocarbon is made by reacting fluorine-containing compound such metal fluoride with CO in an energized state, e.g. plasma excitation, to form a gaseous reaction mixture which is a precursor to COF.sub.2, followed by reacting this reaction mixture with carbon and quenching to obtain the desired fluorocarbon.
Claims36
Process for the preparation of perfluorocarbon containing at least two carbon atoms, comprising
- feeding fluorine-containing compound having a molecular weight greater than 20 and gaseous CO to a reaction zone wherein the fluorine-containing compound is split apart to liberate fluorine from said fluorine-containing compound and obtaining a gaseous reaction mixture which contains said fluorine and said CO,
- reacting said reaction mixture with carbon at a temperature of at least 1500.degree. C. to obtain a gaseous reaction product,
- rapidly cooling said gaseous reaction product to obtain said perfluorocarbon as a result thereof, and
- recovering said perfluorocarbon from said gaseous reaction product.
Process comprising contacting and reacting fluorine-containing compound with CO to form a gaseous reaction mixture which is capable of being quenched to form COF.sub.2 and contacting and reacting said gaseous reaction mixture with carbon to form a second gaseous reaction mixture which is capable of being quenched to form perfluorocarbon which contains at least 2 carbon atoms and quenching said second gaseous reaction mixture.
Process of reacting metal fluoride and CO by plasma excitation to form a gaseous reaction mixture which is capable of being quenched to COF.sub.2 and reacting at least a portion of said gaseous mixture with carbon at a temperature of at least 1500.degree. C. to form a second gaseous mixture which is capable of being quenched to form perfluorocarbon containing at least 2 carbon atoms and quenching said second gaseous reaction mixture.
Dependencies are inferred from the claim text.