Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1989-12-20
1991-12-17
Konopka, Paul E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
208140, 502 37, 502 50, 502 52, 585419, 585434, B01J 2938, B01J 2396, B01J 3820, C10G 35095
Patent
active
050735292
ABSTRACT:
A deactivated catalyst comprising a nonacidic zeolite and a Group VIII metal is regenerated by a two-step carbon burn process. The first oxidation step contacts the nonacidic zeolite catalyst with a halogen-free gaseous stream comprising oxygen and an inert gas at a first temperature sufficient to combust carbonaceous material while maintaining a substantial portion of the active Group VIII metal surface area withn the micropores of the nonacidic zeolite for a first period of time sufficient to substantially complete combustion of at least a portion the carbonaceous material at the first temperature. The second step contacts this nonacidic zeolite catalyst with a gaseous stream comprising oxygen and an inert gas at a second temperature sufficient to combust any remaining carbonaceous material for a second period of time sufficient to maintain a substantial portion of the active Group VIII metal surface area in the micropores of the nonacidic zeolite catalyst.
REFERENCES:
patent: 2880162 (1959-03-01), Moore
patent: 4141817 (1979-02-01), McVicker et al.
patent: 4600700 (1986-07-01), McHale
patent: 4621069 (1986-11-01), Ganguli et al.
patent: 4721694 (1988-01-01), Buss et al.
Cilluffo Sandra L.
Miller Jeffrey T.
Modica Frank S.
Shum Victor K.
Amoco Corporation
Konopka Paul E.
Magidson William H.
Medhurst Ralph C.
Taylor Reginald K.
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