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:
Apr. 01, 1986
Filed:
Dec. 07, 1984
Applicant:
Inventors:
Bernard Cheminal, Lyons, FR;
Henri Mathais, Saint Didier au Mont D'or, FR;
Assignee:
Atochem, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568466 ; 568458 ; 568490 ;
Abstract
There is disclosed a continuous catalytic process for the preparation of trifluoroacetaldehyde through fluorination in the gaseous phase of trichloroacetaldehyde in a single reaction zone at a temperature between 230.degree. C. and 260.degree. C., on a catalyst comprising a gamma alumina impregnated by Cr.sub.2 O.sub.3 in an amount of 1.5 to 4 atoms of chromium per liter of alumina and activated at a temperature between 300.degree. C. and 400.degree. C. by a mixture of hydrofluoric acid and 1,1,2-trichloro-1,2,2-trifluoro-ethane.