Catalyst for purifying exhaust gas from vehicles

Details Catalyst for purifying exhaust gas from vehicles Catalyst for purifying exhaust gas from vehicles

1974-04-12

1976-01-06

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252465, 252466PT, 252466B, 252472, 252473, 252474, 252477R, 4232135, B01J 2104, B01J 2340, B01J 2364

Patent

active

039310507

ABSTRACT:
A catalyst for purifying exhaust gas from vehicles comprises a monolithic carrier having a plurality of exhaust gas passages penetrating through the carrier, a layer of active refractory metallic oxide such as .gamma.-alumina, containing 1 to 20% by weight of a catalytic metal such as platinum deposited as first layer on inside surfaces of said plurality of the passages, and a layer of exhaust gas-permeable refractory metallic oxide such as .gamma.-alumina free from a catalytic metal deposited as an outermost layer further upon the first layer.

REFERENCES:
patent: 3397154 (1968-08-01), Talsma
patent: 3615166 (1971-10-01), Hindin et al.
patent: 3741725 (1973-06-01), Graham
patent: 3839224 (1974-10-01), Yonehara et al.

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