Reactivating iridium-containing catalysts with hydrogen halide a

Details Reactivating iridium-containing catalysts with hydrogen halide a Reactivating iridium-containing catalysts with hydrogen halide a

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

044448970

ABSTRACT:
A process is disclosed for reactivating an agglomerated iridium-containing catalyst and particularly platinum-iridium on alumina reforming catalysts. The process includes contacting a substantially decoked agglomerated catalyst with a reducing gas such as hydrogen to reduce agglomerated iridium oxides present to the free metal, a hydrogen halide pretreatment step to increase the halogen level of the catalyst to about 1.3 weight percent and above, and a redispersion step involving hydrogen halide and elemental oxygen. Use of hydrogen halide and elemental oxygen in the redispersion treatment eliminates the need for use of elemental chlorine gas. If no iridium oxides are initially present, the hydrogen reduction step is optional.

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