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:
Oct. 19, 1993
Filed:
Dec. 28, 1992
Applicant:
Inventor:
Robert A Prokop, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
570138 ; 570126 ; 570136 ;
Abstract
A process for the oligomerization of hexafluoropropene comprises contacting hexafluoropropene with a catalyst or a mixture of catalysts selected from the group consisting of the cyanide, cyanate, and thiocyanate salts of alkali metals, quaternary ammonium, and quaternary phosphonium, in the presence of polar, aprotic solvent, e.g., acetonitrile. The process of the invention is especially useful for selectively preparing hexafluoropropene dimers, e.g., perfluoro-2-methyl-2-pentene and perfluoro-2-methyl-3-pentene, in good yield by the proper choice of solvent and catalyst.