Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1990-05-22
1991-10-15
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
502178, 502230, 502231, 570176, B01J 2396, B01J 2713, B01J 3842, C07C 1908
Patent
active
050574701
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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E. I. Du Pont de Nemours and Company
Konopka Paul E.
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