Use of copper-nickel catalysts for dehlogenation of chlorofluorocompounds
AssigneeE. I. Du Pont de Nemours and Company
InventorsMario Joseph Nappa, Ekaterina N. Swearingen, Allen Capron Sievert, Xuehui Sun
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Abstract
The disclosure describes a process for dehalogenation of chlorofluorocompounds. The process comprises contacting a saturated chlorofluorocompound with hydrogen in the presence of a catalyst at a temperature sufficient to remove chlorine and/or fluorine substituents to produce a fluorine containing terminal olefin.
Claims23
A process for dehalogenation of chlorofluorocompounds comprising contacting a saturated chlorofluorocompound with hydrogen in the presence of a catalyst at a temperature sufficient to remove chlorine or fluorine substituents to produce a fluorine containing terminal olefin wherein the catalyst is effective for dehalogenation of chlorofluorocompounds and wherein said chlorofluorocompound comprises a chlorofluorocompound having the formula:
- RfCFX1CH2X2
- wherein Rf is a fluoroalkyl group selected from CF3, C2F5, CHF2, and C3F7;
- X1 is selected from F and Cl;
- and
- X2 is selected from Cl, Br, and I, wherein said catalyst is selected from copper on carbon, copper on calcium fluoride, copper and nickel on carbon, nickel and carbon, copper/nickel/chromium on calcium fluoride, unsupported alloys of copper and nickel, ruthenium on carbon, and rhenium on carbon.
Dependencies are inferred from the claim text.