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:
Dec. 26, 2000
Filed:
Apr. 11, 1997
V N Rao, Wilmington, DE (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A process is disclosed for increasing the fluorine content of a saturated or olefinic halogenated hydrocarbon starting material of the formula C.sub.n H.sub.a Cl.sub.b F.sub.c, wherein n is an integer from 1 to 6, a is an integer from 0 to to 12, b is an integer from 0 to 13 and c is an integer from 0 to 13. The process involves contacting the starting material in the vapor phase at a temperature in the range of about 150.degree. C. to about 500.degree. C. with HF and a catalytic metal supported on a trivalent lanthanum compound support (the catalytic metal being chromium, cobalt, nickel, zinc, magnesium, copper, silver and/or gold). Certain catalytic compositions including catalytic metal (e.g., chromium, nickel, cobalt, zinc and/or magnesium) supported on a support at trivalent lanthanum compound containing fluoride anion are also disclosed. The atomic ratio of catalytic metal to lanthanum in the compositions is from about 1:1 to 1:999.