Rejuvenation of nitrogen-damaged noble metal zeolite catalysts

Details Rejuvenation of nitrogen-damaged noble metal zeolite catalysts Rejuvenation of nitrogen-damaged noble metal zeolite catalysts

1977-07-11

1978-09-26

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

208111, 252419, 252455Z, B01J 2938, B01J 2912, C10G 1310

Patent

active

041168674

ABSTRACT:
Certain hydrocarbon conversion catalysts comprising a Group VIII noble metal in an oxidized state, dispersed on a crystalline hydrogen zeolite, e.g. Y zeolite, are found to suffer a drastic loss in activity upon exposure to nitrogen at elevated temperature. It is now found that this damage can be substantially completely reversed by subjecting the catalyst to oxidation with an oxygen-containing gas.

REFERENCES:
patent: 3011968 (1961-12-01), Webb
patent: 3197399 (1965-07-01), Wight et al.
patent: 3287257 (1966-11-01), Hansford et al.
patent: 3535272 (1970-10-01), Kittrell et al.
patent: 4064036 (1977-12-01), Clark

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