Patent ID: 9132419
Filing Date: 2015-09-15
Classification: B01D,B01J

Abstract:
1. A method of producing a nitrogen oxide purification catalyst in which particulates are supported on a metal oxide carrier, comprising the steps of: preparing a mixture containing a silver salt, a nickel salt and a polymer used as a protecting agent, in which mixture the ratio of said silver salt and said nickel salt is a ratio at which the ratio of Ni with respect to the total amount of Ag and Ni becomes 10 to 90 at %; preparing a colloidal suspension by mixing said mixture and a reducing agent; mixing said suspension and a metal oxide carrier, wherein the ratio of suspension and the metal oxide carrier is a ratio at which, with respect to the amount of the metal oxide carrier, the total amount of the supported Ag and Ni becomes 0.05 to 10% by mass, removing solvent from the thus obtained mixture to obtain a colloidal precipitate; and activating the thus obtained colloidal precipitate, wherein said particulates supported on said metal oxide carrier consist of Ag and Ni and said Ag and said Ni are at least partially alloyed.