E.i. Dupont De Nemours and Company

Elrey L McCann

Leo E Manzer

James L Webster

Douglas W Bruhnke

Steven Henry Swearingen

William H Manogue

Swiatoslaw Trofimenko

Jan J Lerou

Paul R Resnick

Cristobal Bonifaz

James Arthur Trainham

The present invention relates to syntheses of perfluoropropane-- .e., octafluoropropane--from acyclic three-carbon hydrocarbons or partially or totally halogenated acyclic three-carbon hydrocarbons.

Synthesis of perfluoropropane

The present invention relates to multistep syntheses of hexafluoropropylene from hexachloropropylene. In all these syntheses the first step is a fluorination of the starting material; later steps convert the initial products to CF.sub.3 --CFCl--CF.sub.3, which is dehalogenated to the desired product.

Multistep synthesis of hexafluoropropylene

The present invention relates to multistep syntheses of hexafluoropropylene from acyclic three-carbon hydrocarbons or partially halogenated acyclic three-carbon hydrocarbons. In all these syntheses the first step is a vapor-phase chlorofluorination of the starting material to one or more saturated chlorofluorocarbons. Novel catalysts are also provided.

The present invention relates to multistep syntheses of hexafluoropropylene from propane, propylene or partially halogenated acyclic three-carbon hydrocarbons. In all these syntheses the first step is a vapor-phase chlorofluorination of the starting material to the unsaturated chlorofluorocarbon CF.sub.3 CClCCl.sub.2.

Improved process for the catalytic gas phase preparation of low molecular weight (C.sub.2-6) olefinic hydrocarbons from mixtures of H.sub.2 and CO, the improvement consisting of contacting and reacting a mixture of H.sub.2 and CO, at a H.sub.2 /CO molar ratio within the range 0.3 to 1.5, at a space velocity of 1 to 100 minutes.sup.-1, at a pressure of 1 to 2000 psia (6.894 kPa to 13.788 MPa), at a temperature within the range 200.degree. to 400.degree. C., in the presence of the catalyst of the empirical formula AB.sub.1-a Fe.sub.a O.sub.3, wherein A, B and a are defined herein, for example, LaFeO.sub.3.

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Mendenhall, PA, United States of America

Elrey L McCann