Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1983-11-02
1985-01-08
Konopka, P. E.
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
208140, B01J 2730, B01J 2396, B01J 2702, C10G 35085
Patent
active
044927673
ABSTRACT:
A process is disclosed for reactivating a coked and agglomerated iridium and selenium containing catalyst and particularly platinum-iridium-selenium 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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Exxon Research and Engineering Co.
Konopka P. E.
Mazer Edward H.
North Robert J.
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