Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1991-07-11
1993-04-13
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570175, C07C 1908
Patent
active
052025101
ABSTRACT:
A process is disclosed for the treatment of a new or deactivated supported metal catalyst containing noble metal to prepare said catalyst for use in the hydrodehalogenation of a compound having the formula C.sub.n H.sub.m F.sub.p X.sub.q, where each X is independently selected from Cl and Br, wherein n is an integer from 1 to 6, m is an integer from 0 to 12, p is an integer from 1 to 13, and q is an integer from 1 to 13, and wherein m+p+q equals 2n+2 for saturated compounds which are acyclic, m+p+q equals 2n for saturated compounds which are cyclic and for olefinic compounds which are acyclic, and m+p+q equals 2n-2 for olefinic compounds which are cyclic, comprising the step of contacting said catalyst with an atmosphere comprising chlorine gas at a temperature from about 100.degree. C. to 400.degree. C. for a time sufficient to improve the catalytic activity thereof for said hydrodehalogenation. A process is also disclosed for catalytic hydrodehalogenation characterized by using a supported metal catalyst containing noble metal which has been so contacted with an atmosphere comprising chlorine.
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Chemical Abstracts 8537659c.
J. P. Franck et al., "Progress in Catalyst Deactivation," (J. L. Figueiredo, ed.) pp. 386-391.
E. I. Du Pont de Nemours and Company
Siegel Alan
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