US 10,512,898 B2Granted

Layered automotive catalyst composites

AssigneeBASF SE

InventorsMichel Deeba, Yipeng Sun, Tian Luo, Emi Leung, Pavel Ruvinskiy, Dinh Dang

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Abstract

Provided are automotive catalyst composites having a catalytic material on a carrier, wherein the catalytic material comprises at least two layers. The first layer is deposited directly on the carrier and comprises a first palladium component supported on a first refractory metal oxide component, a first oxygen storage component, or a combination thereof. The second layer is deposited on top of the first layer and comprises a rhodium component supported on a second refractory metal oxide component and a second palladium component supported on a second oxygen storage component, a third refractory metal oxide component or a combination thereof. Generally these catalyst composites are used as three-way conversion (TWC) catalysts. Methods of making and using the same are also provided.

Claims25

Dependent claims

An automotive catalyst composite comprising:

a catalytic material on a carrier, the catalytic material comprising at least two layers:
a first layer deposited directly on the carrier comprising a first palladium component supported on a first refractory metal oxide component, a first oxygen storage component, or a combination thereof;
and
a second layer deposited on top of the first layer comprising a rhodium component supported on a second refractory metal oxide component and a second palladium component supported on a second oxygen storage component, a third refractory metal oxide component or a combination thereof;
wherein the second refractory metal oxide component comprises zirconia-stabilized alumina or a zirconia-based support selected from the group consisting of zirconia, lanthana-zirconia, titania-zirconia, titania-lanthana-zirconia, and combinations thereof,
wherein the catalytic material is effective for carrying out three-way conversion (TWC).

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/738,858Filed 24 Jun 2016 · us provisional application
Priority: 24 Jun 2015
Published: US 2018/0178198 A128 Jun 2018
Granted: 24 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification38 codes

B01J 23/63
Platinum group metals: with rare earths or actinides
B01D 53/945
Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]:…
B01J 35/19
Catalysts, in general, characterised by their form or physical properties: catalysts containing parts with different compositions
B01J 37/0234
Impregnation, coating or precipitation: impregnation and coating simultaneously