Redispersion of noble metals on supported catalysts

Details Redispersion of noble metals on supported catalysts Redispersion of noble metals on supported catalysts

1977-01-10

1979-04-10

Douglas, Winston A.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

208111, 252412, 252413, 252455Z, B01J 2938, B01J 2912, B01J 2932, L10G 1310

Patent

active

041487508

ABSTRACT:
Noble metals on supported zeolite-containing hydrocarbon conversion catalysts, which have been at least partially damaged by thermal and/or hydrothermal stresses resulting in a maldistribution of the supported metal, are redispersed to a highly active, high surface area state by contacting said catalyst with ethylenediaminetetraacetic acid (EDTA), or a salt thereof, to the point of incipient wetness and then removing said acid by heat treatment.

REFERENCES:
patent: 3684738 (1972-08-01), Chem
patent: 3692692 (1972-09-01), Ward et al.
patent: 3849293 (1974-11-01), Ward
patent: 3899441 (1975-08-01), Hansford

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