Catalyst for purification of exhaust gases and processes for its

Details Catalyst for purification of exhaust gases and processes for its Catalyst for purification of exhaust gases and processes for its

1974-02-04

1977-09-13

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252438, 252443, 252455R, 252458, 252460, 252462, 252465, 252466B, 252466PT, 252470, 252471, 252472, 4232135, B01J 2100, B01J 2104, B01J 2108, B01J 2112, B01J 2364, B01J 2374

Patent

active

040480984

ABSTRACT:
A carrier catalyst comprises as the catalytically active component an intermetallic system of at least three metals, wherein at least one of said three metals is selected from the group consisting of (a) ruthenium, rhodium, palladium and platinum, and wherein at least one of said three metals is a base metal selected from the group consisting of (b) aluminum, titanium, chromium, manganese, cobalt and nickel, and further wherein said group (a) metals and said group (b) metals are in an atomic ratio of about 1:4 to 1:1, provided that, when said system contains platinum, rhodium and at least one of said base metals, the atomic ratio is 1:4 to 1:2.4. The catalyst can also contain aluminum.

REFERENCES:
patent: 3257163 (1966-06-01), Stiles
patent: 3458276 (1969-07-01), Bloch
patent: 3493325 (1970-02-01), Roth
patent: 3656915 (1972-04-01), Tourtellotte
patent: 3699683 (1972-10-01), Tourtellotte et al.
patent: 3702236 (1972-11-01), Fessler
patent: 3751497 (1973-08-01), Schwerdtel et al.
patent: 3784675 (1974-01-01), Kobylinski et al.
patent: 3819536 (1974-06-01), DallaBetta et al.
patent: 3840471 (1974-10-01), Acres
patent: 3852215 (1974-12-01), Duhaut et al.
patent: 3963827 (1976-06-01), Acres et al.

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