Patent ID: 7476417
Filing Date: 2009-01-13
Classification: B01J,B05D,C04B,C23C,Y02T

Abstract:
1. A method of coating a substrate comprising an inlet end, an outlet end, wall elements extending between the inlet end to the outlet end and a plurality of axially enclosed channels defined by the wall elements, at least some of the channels having a channel inlet at the inlet end and a channel outlet at the outlet end, the method comprising: passing at least a first inlet fluid composition into the inlet end of the substrate to form at least a first inlet end layer on the walls and extending for only part of the length from the inlet end toward the outlet end, the first inlet fluid composition comprising at least one first inlet base metal oxide component and at least one first inlet precious metal component; and applying a vacuum to the outlet end while forcing a heated gas stream through the channels from the inlet end after the formation of each inlet end layer without significantly changing the length of each inlet layer, wherein the temperature of the heated gas is from about 200° C. to about 400° C. to fix the first inlet precious metal component.