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. 24, 1989
Filed:
Nov. 08, 1984
Louis Foulletier, Oullins, FR;
PCUK-Produits Chimiques Uginc Kuhlmann, Courbevoie, FR;
Abstract
This invention relates to improved catalysts for gaseous phase fluoridation of aliphatic chlorinated and chlorofluorinated hydrocarbons by hydrofluoric acid. The catalysts comprise chromium salts or oxides complexed with aluminum phosphate and are characterized by a total specific surface area greater than about 200 m.sup.2 /g, but less than about 1000 m.sup.2 /g a surface area of pores of 40 to 50 .ANG. in radius above about 5 m.sup.2 /g, but less than about 150 m.sup.2 /g, a surface area of pores greater than or equal to 250 .ANG. in radius above about 2 m.sup.2 /g. but less than about 60 m.sup.2 /g. This invention also relates to gaseous phase fluoridation processes for chlorinated or chlorofluorinated derivatives utilizing these catalysts in fluidized bed reactors.