Catalyst having protection against poisoning by extraneous...

Details Catalyst having protection against poisoning by extraneous... Catalyst having protection against poisoning by extraneous...

B - Operations, Transporting

01

J

252/48, 252/56

B01J 23/10 (2006.01) B01D 53/94 (2006.01) B01J 23/40 (2006.01) B01J 23/63 (2006.01) B01J 33/00 (2006.01)

Patent

CA 1115682

Abstract of the Disclosure 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. An alumina-ceria mixture 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.

294299

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