Reactivation of iridium-containing catalysts by halide pretreat

Details Reactivation of iridium-containing catalysts by halide pretreat Reactivation of iridium-containing catalysts by halide pretreat

1982-05-05

1984-04-24

Konopka, P. E.

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

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

208140, 502 35, 502230, B01J 2396, B01J 2346, B01J 2364, C10G 35085

Patent

active

044448961

ABSTRACT:
A process is disclosed for reactivating an agglomerated iridium-containing catalyst and particularly a platinum-iridium on alumina reforming catalyst. The process includes contacting an agglomerated catalyst with a reducing gas such as hydrogen to reduce agglomerated iridium oxides to the free metal, a hydrogen chloride pretreatment step to increase the chloride level of the catalyst to about 1.6 weight percent and above, and a redispersion step involving contacting with elemental oxygen. The process eliminates the need for gaseous chlorine in the redispersion feedstream. If no iridium oxides are initially present, the hydrogen reduction step is optional.

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