Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1991-12-23
1993-04-13
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502244, 502256, 502261, B01J 2106, B01J 2326, B01J 2340, B01J 2372
Patent
active
052022994
ABSTRACT:
A catalyst for treatment of exhaust emissions from diesel engines includes a washcoat layer with a catalytically active metal. The washcoat layer has refractory oxide particles with catalytically active metal particles dispersed thereon, and colloidal silica disposed in a thin layer over the refractory oxide and metal particles. The refractory oxide particles and colloidal silica are each characterized by respective surface charges at a selected pH to cause the colloid to form the layer over the refractory oxide and metal particles. Preferably, the pH is selected to provide opposite and attractive surface charges between the colloidal silica and the refractory oxide particles. Preferably, the metal particles are at least one of the group consisting essentially of platinum, palladium, rhodium, ruthenium, copper and chromium.
REFERENCES:
patent: 2882245 (1959-04-01), Heinmann et al.
patent: 3491020 (1970-01-01), Carr et al.
patent: 3518206 (1970-06-01), Sowards et al.
patent: 3956185 (1976-05-01), Yagi et al.
patent: 4749671 (1988-06-01), Saito et al.
patent: 4760044 (1988-07-01), Joy, III et al.
patent: 4868148 (1989-09-01), Henk et al.
Beckmeyer Richard F.
Symons Walter T.
Dees Carl F.
General Motors Corporation
Grove George A.
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