Exhaust gas purifying catalyst
AssigneeBridgestone Corporation
InventorsChikara Yamada, Yoji Watabe, Koichi Irako, deceased, Yuichi Murakamai
Life of this patent
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Abstract
A catalyst comprising (a) copper or a copper compound; (b) vanadium or a vanadium compound; (c) zirconium, aluminum, nickel, iron, manganese, lanthanum, chromium, zinc, lead, or cerium, or a compound thereof; and optionally, (d) platinum, rhodium, or palladium, or a compound thereof is carried on a porous ceramic body to assist in purifying exhaust gases from Diesel engines.
Claims11
A catalyst suitable for assisting in purifying exhaust gases consisting essentially of
- (a) at least one member selected from the group consisting of copper and copper compounds;
- (b) at least one member selected from the group consisting of vanadium and vanadium compounds;
- and
- (c) at least one member selected from the group consisting of zirconium, aluminum, iron, lanthanum, lead, cerium and compounds thereof.
A particulate collector carrying thereon a catalyst suitable for assisting in purifying exhaust gases, said catalyst comprising
- (a) at least one member selected from the group consisting of copper and copper compounds;
- (b) at least one member selected from the group consisting of vanadium and vanadium compounds;
- (c) at least one member selected from the group consisting of zirconium, aluminum, nickel, iron, manganese, lanthanum, chromium, zinc, lead, cerium and compounds thereof;
- and
- (d) at least one member selected from the group consisting of platinum, rhodium, palladium and compounds thereof.
Dependencies are inferred from the claim text.