Exhaust emission control catalyst and process for producing...

B - Operations – Transporting – 01 – J

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B01J 23/40 (2006.01) B01D 53/94 (2006.01) B01J 21/04 (2006.01) B01J 29/06 (2006.01) B01J 29/068 (2006.01)

Patent

CA 2150379

An exhaust emission control catalyst having superior NOx cleaning capability has .theta. and .alpha. phases and is constituted by modified alumina having an alpha ratio R represented by 0.5 % <= R <= 95 % and a catalytic metal carried on the modified alumina such as platinum Pt. In addition, a catalyst constituted by the above catalyst as a catalytic element and aluminosilicate or CeO2 also has a superior NOx cleaning capability.

Un catalyseur d'emissions d'échappement présentant des capacités supérieures d'épuration de NOx présente des phases .theta. et .alpha., et est constitué d'oxyde d'aluminium modifié présentant un rapport alpha R représenté par 0,5 % <= R <= 95 %, ainsi qu'un métal catalytique porté sur l'oxyde d'aluminium modifié tel que du platine Pt. De plus, un catalyseur constitué du catalyseur précité utilisé comme élément catalytique et d'aluminosilicate ou de CeO¿2? présente également des capacités supérieures d'épuration de NOx.

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