Rare earth containing catalyst composition

Details Rare earth containing catalyst composition Rare earth containing catalyst composition

1973-12-10

1976-11-23

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

4232135, B01J 2310, B01J 2104

Patent

active

039935728

ABSTRACT:
Catalysts suitable for promoting selected oxidation and reduction reactions; especially for eliminating or substantially reducing pollutants in waste gas streams such as automobile exhaust, or nitric acid plant tail gas, are described, as are processes for their preparation and use. The catalysts contain platinum group metal, rare earth metal and alumina components which may be supported on relatively catalytically inert carriers, for instance, honeycombs. The catalysts can be prepared, for example, by pre-calcining a mixture of alumina and rare earth metal oxide, e.g., ceria, at a temperature of at least about 750.degree. C. to obtain a catalytically-active material; coating a relatively inert support, if such is used, with an aqueous slurry of the calcined material; calcining the composite, adding platinum group metal thereto and drying.

REFERENCES:
patent: 3259453 (1966-07-01), Stiles
patent: 3271324 (1966-09-01), Stephens et al.
patent: 3322491 (1967-05-01), Barrett et al.
patent: 3483138 (1969-12-01), Stephens
patent: 3545917 (1970-12-01), Stephens
patent: 3615166 (1971-10-01), Hindin et al.
patent: 3741725 (1973-06-01), Graham
patent: 3776859 (1973-12-01), Simpson
patent: 3899444 (1975-08-01), Stephens
patent: 3903020 (1975-09-01), Sergeys et al.

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