Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1986-02-25
1990-01-02
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
502 53, 502230, 502333, 560206, 560207, B01J 2396, B01J 3842, C07C 6736
Patent
active
048913464
ABSTRACT:
Included is a process for redispersing catalysts wherein the catalyst metal is selected from the group consisting of ruthenium, osmium, rhodium and palladium comprising contacting the catalyst serially with (1) a reducing agent; (2) a halogen redispersing agent; and (3) a reducing agent, under conditions sufficient to redisperse the sintered catalyst. A preliminary oxygen treatment is optional. Also included are the novel catalysts such as redispersed by the foregoing process and processes in which sintered catalysts are redispersed and in which the redispersed catalysts are employed.
The redispersed catalysts can have very high activity and can even have activity higher than originally found. A preferred metal is palladium and a preferred support is alumina.
A preferred process for employing the redispersed catalyst is the production of .alpha.-substituted acrylate esters. For example, methylmethacrylate can be prepared from carbon monoxide, 2-chloropropene and methanol in the presence of the redispersed palladium on alumina catalyst.
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Konopka Paul E.
The Dow Chemical Company
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