Catalyst for reducing pollutants in waste gas streams and proces

Details Catalyst for reducing pollutants in waste gas streams and proces Catalyst for reducing pollutants in waste gas streams and proces

1977-01-06

1980-06-03

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

4232132, 4232135, 252477R, B01J 2104, B01J 2310, B01J 2340, B01J 2374

Patent

active

042060877

ABSTRACT:
Macrosized catalysts suitable for promoting chemical reactions, especially to reduce pollutants in waste gas streams such as automobile exhaust, are described. The catalysts have one or more metal components, especially a platinum group metal component, as a catalytic promoter combined with a high surface area, refractory oxide support. Alumina is added to the macrosize catalyst to provide protection against poisoning by extraneous materials such as lead, zinc, other metals, sulfur or phosphorus with which the catalysts may come in contact during use. These catalysts may have a relatively catalytically-inactive carrier, especially a monolithic carrier which may be of the honeycomb type.

REFERENCES:
patent: 3565830 (1971-02-01), Keith et al.
patent: 3741725 (1973-06-01), Graham
patent: 3839224 (1974-10-01), Yonehara et al.
patent: 3914376 (1975-10-01), Barker
patent: 3931050 (1976-01-01), Asano et al.

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