The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1991
Filed:
Dec. 19, 1989
Applicant:
Inventors:
James L Webster, Parkersburg, WV (US);
Elrey L McCann, Mendenhall, PA (US);
Douglas W Bruhnke, Landenberg, PA (US);
Jan J Lerou, Chadds Ford, PA (US);
Leo E Manzer, Wilmington, DE (US);
William H Manogue, Newark, DE (US);
Paul R Resnick, Wilmington, DE (US);
Swiatoslaw Trofimenko, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
570157 ; 570156 ; 570165 ; 570166 ; 570168 ; 570169 ;
Abstract
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.