Patent ID: 7208444
Filing Date: 2007-04-24
Classification: B01D,B01J,F01N,Y02A,Y02T,Y10T

Abstract:
1. A method of producing an exhaust gas purifying catalyst, comprising: coating a substrate with a first slurry containing a catalytic component; drying and firing the first slurry on said substrate to form an inner catalytic coat layer on said substrate; coating a second slurry containing a catalytic component, on an upper-most surface of said inner catalytic coat layer, particle materials contained in said second slurry having an average particle size ranging from 4.6 to 7 μm; and drying and firing the second slurry on the inner catalytic coat layer to form an upper-most catalytic coat layer having a thickness of not larger than 50 μm, the upper-most catalytic coat layer serving as a crack-preventing coat layer.