Low temperature decoking process for reactivating iridium contai

Details Low temperature decoking process for reactivating iridium contai Low temperature decoking process for reactivating iridium contai

1982-05-05

1984-09-18

Konopka, P. E.

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

208140, 502 36, B01J 2396, C10G 3509, C10G 35085

Patent

active

044725159

ABSTRACT:
A process is disclosed for reactivating a coked and agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes a low temperature decoking step to achieve partial decoking while minimizing agglomeration, a reducing step involving contacting the decoked agglomerated catalyst with a reducing gas such as hydrogen to reduce agglomerated iridium oxides to the free metal, a halide pretreatment step to increase the chloride level of the catalyst to about 1.3 weight percent and above, and a halogen redispersion step. The redispersion step is performed with a mixture of elemental halogen and water vapor.

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