Catalyst for the purification of exhaust gases

Details Catalyst for the purification of exhaust gases Catalyst for the purification of exhaust gases

1987-12-08

1989-02-28

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

4232135, B01J 2104, B01J 2310, B01J 3200

Patent

active

048085642

ABSTRACT:
A catalyst for the purification of exhaust gases capable of maintaining excellent durability at elevated temperatures and preventing the formation of LaAlO.sub.3, comprises a support substrate, a catalyst carrier layer formed on the support substrate and catalyst ingredients carried on the catalyst carrier layer. The catalyst carrier layer comprises oxides of lanthanum and cerium in which the molar fraction of lanthanum atoms to the total rare earth atoms is 0.05 to 0.20, and the ratio of the member of the total rare earth atoms to the number of aluminum atoms is 0.05 to 0.25.

REFERENCES:
patent: 3003020 (1961-10-01), Miller
patent: 3951860 (1976-04-01), Acres et al.
patent: 4170573 (1979-10-01), Ernest et al.
patent: 4528279 (1985-07-01), Suzuki et al.
patent: 4591580 (1986-05-01), Kim et al.

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