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:
Mar. 08, 1988
Filed:
May. 20, 1986
Giorgio Bornengo, Novara, IT;
Filippo M Carlini, Vicenza, IT;
Michele Pontevivo, Novara, IT;
Giorgio Guglielmo, Gallarate, IT;
Ausimont S.p.A., Milan, IT;
Abstract
Process for the preparation of 2-perfluoropropoxy-perfluoropropionyl fluoride by dimerization of hexafluoropropene epoxide in aprotic polar medium, in the presence of N,N,N',N'-tetrasubstituted diaminodifluoromethane as catalyst, characterized in that the dimerization reaction is carried out in the presence of a co-catalyst constituted by a nitrogenous organic base having structure of aniline, or of pyridine, or of a derivative thereof, wherein the nitrogen atom is not linked to hydrogen atoms and, in the case of the pyridine-type structure, it is sterically hindered by substituent groups on ortho-position relatively to it.