Process of manufacturing a catalyst for purifying the exhaust ga

Details Process of manufacturing a catalyst for purifying the exhaust ga Process of manufacturing a catalyst for purifying the exhaust ga

1985-09-30

1986-11-25

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502303, 502304, 4232135, B01J 2104, B01J 2310, B01J 2338

Patent

active

046249419

ABSTRACT:
To manufacture a catalyst for purifying the exhaust gases from internal combustion engines, which catalyst comprises a skeleton comprising sintered alumina and at least one stabilizing rare earth element oxide and is preferably provided as a coating on a metallic, mineral or ceramic support, and which catalyst comprises at least one noble metal, which is finely dispersed on said skeleton, a solution is provided, which contains at least one noble metal salt and at least one salt of at least one rare earth element and optionally also an aluminum salt. Said solution is subjected to spray pyrolysis in contact with oxygen to produce a composite powder consisting of at least one noble metal, at least one rare earth element oxide and, if desired, alumina. Said composite powder is applied and sintered to a surface layer of the alumina skeleton.

REFERENCES:
patent: 3957692 (1976-05-01), Cairns et al.
patent: 4465654 (1984-08-01), Faschingbauer

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