Patent ID: 6753293
Filing Date: 2004-06-22
Classification: B01D,B01J,G01N

Abstract:
A process of coating the surface of a substrate with catalytic components to form a catalyst, wherein the catalyst is a catalyst matrix having two or more catalytic components which are layered successively on the substrate, comprising the following sequence of steps.(a) infusing the substrate with more than an adequate amount of solution having a starting material comprising a catalytic component precursor, wherein the thermal decomposition product of the catalytic component precursor is a catalytic component and wherein an adequate amount of solution is an amount that thoroughly coats the substrate; (b) removing from the substrate any solution in excess of an adequate amount, thereby leaving a coating of the catalytic component precursor on the surface of the substrate; (c) heating the coated substrate thereby converting the coating of the catalytic component precursor to the catalytic component by thermal decomposition, the catalytic component being a first catalytic component; (d) etching the coated substrate; (e) repeating steps (a)-(c) for a second catalytic component.