04868148 is referenced by 82 patents and cites 15 patents.

This invention relates to a catalytic composite for treating an exhaust gas comprising a first support which is refractory inorganic oxide having dispersed thereon at least one noble metal component and having dispersed immediately thereon an overlayer comprising at least one oxygen storage component and optionally a second support which is a refractory inorganic oxide. The first support may be selected from the group consisting of alumina, silica, titania, zirconia and aluminosilicates with alumina being preferred. Additionally, the noble metal component may be selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium. The oxygen storage component is an oxide of a metal which includes cerium, iron, nickel, cobalt lanthanum, neodymium, praesodymium, etc. and mixtures thereof. Cerium oxide is a preferred oxygen storage component. Finally, the second support may be selected from the group consisting of alumina, silica, titania, zirconia and aluminosilicates, with alumina preferred. This invention also relates to a process for minimizing the content of hydrogen sulfide in an automotive exhaust gas which comprises contacting said exhaust gas with a catalyst composite comprising a first support which is a refractory inorganic oxide having dispersed thereon at least one noble metal component and having dispersed immediately thereon an overlayer comprising at least one oxygen storage component and optionally a second support which is refractory inorganic oxide.

Title
Layered automotive catalytic composite
Application Number
88745
Publication Number
4868148
Application Date
June 1, 1988
Publication Date
September 19, 1989
Inventor
Jack C Summers II
Tulsa
OK, US
Michael G Henk
Tulsa
OK, US
Agent
Roger H Criss
Harold N Wells
Frank S Molinaro
Assignee
Allied Signal
NJ, US
IPC
B01J 23/76
B01J 23/56
B01J 23/10
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