05597771 is referenced by 131 patents and cites 50 patents.

The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of the layered catalyst composite of the present invention is designed wherein there is a first layer and a second layer. The first layer comprises a first support; at least one first palladium component and an oxygen storage component in intimate contact with the palladium component; optionally another first platinum group metal component; a zirconium component; at least one first alkaline earth metal components and at least one first rare earth metal component selected from the group consisting of lanthanum metal components and neodymium metal components. The second layer comprises a second support; at least one second palladium component; optionally another second platinum group metal component; at least one second alkaline earth metal component; at least one second rare earth component selected from the group consisting of lanthanum metal components and neodymium metal components and a zirconium component.

Title
Layered catalyst composite
Application Number
83143
Publication Number
5597771
Application Date
June 24, 1994
Publication Date
January 28, 1997
Inventor
Joseph C Dettling
Howell
NJ, US
Yiu Kwan Lui
Parlin
NJ, US
Chung Zong Wan
Somerset
NJ, US
Zhicheng Hu
Edison
NJ, US
Agent
R A Negin
Assignee
Engelhard Corporation
NJ, US
IPC
B01J 23/02
B01J 21/04
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