Reactivation process for iridium-containing catalysts using low

Details Reactivation process for iridium-containing catalysts using low Reactivation process for iridium-containing catalysts using low

1983-07-07

1984-10-30

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, 502 74, 502230, B01J 2396, B01J 2364, B01J 2346, C10G 35085

Patent

active

044800460

ABSTRACT:
A process is described for reactivating agglomerated iridium-containing catalysts such as Pt-Ir on Al.sub.2 O.sub.3 reforming catalyst. The agglomerated catalyst is decoked to remove carbon deposits; treated with hydrogen to reduce metal oxides to the free metals; pretreated with hydrogen halide to provide at least about a 1.3 weight percent halide content; and treated with a low mass flow rate of chlorine of about one gram chlorine per 100 grams catalyst per hour. Use of a low mass halogen flow rate significantly retards ferrous metal corrosion and significantly reduces the quantity of chlorine normally used in achieving high redispersion values.

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