Patent ID: 9040003
Filing Date: 2015-05-26
Classification: B01D,B01J,C04B,F01N,Y02A,Y02T,Y10S,Y10T

Abstract:
1. A three-way catalyst comprising an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least two precious metals selected from the group consisting of Pd, Ag, and Rh and optionally at least one non-precious metal, wherein: (i) Pd and Rh are carried in one or more coating layer(s) on a surface of the extruded solid body; (ii) at least one of Pd and Ag is present throughout the extruded solid body and Pd and Rh are carried in one or more coating layer(s) on a surface of the extruded solid body; or (iii) at least one of Pd and Ag is present throughout the extruded solid body, at least one of Pd and Ag is present in a higher concentration at a surface of the extruded solid body and Pd and Rh are carried in one or more coating layer(s) on the surface of the extruded solid body.