Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1992-09-09
1998-07-07
Achutamurthy, Ponnathapura
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
502 35, 208140, B01J 2938, B01J 3844, B01J 3842, C10G 35095
Patent
active
057768498
ABSTRACT:
The invention is directed a process for regenerating deactivated reforming catalysts comprising at least one Group VIII metal on zeolite L, preferably wherein the catalysts are extruded using a binder material such as alumina or silica. The process includes: a) coke burn at severe conditions to improve the accessibility of the Group VIII catalytic metal particles by transporting them to the outside of the zeolite microchannels; b) catalytic metal redispersion by wet oxychlorination with elemental chlorine and oxygen; c) stripping with a gas stream comprising oxygen and water at low pressure to remove as much residual chlorine as possible; and d) reduction of catalytic metals with hydrogen at low pressure. The process is particularly effective for recovering activity of catalysts which have been severely deactivated.
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Clem Kenneth Ray
Fung Shun Chong
Huang Yao-Jyh Robert
McVicker Gary Brice
Walsh John Francis
Achutamurthy Ponnathapura
Exxon Research & Engineering Company
Sherer Edward F.
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