Patent ID: 9399207
Filing Date: 2016-07-26
CPC Classification: B01D,B01J

Claim Text:
1. A method for preparing a denitration catalyst which includes titanium oxide, vanadium and tungsten as catalytic active ingredients thereof comprising: adding a titanium oxide powder to a mixture liquid of a silica sol and water to prepare a slurry; adding an ammonium metavanadate powder to this slurry; adding an aqueous solution of ammonium metatungstate to the slurry; and immersing a honeycomb structure in the slurry; wherein the ammonium metavanadate powder contains particles having a particle diameter of 10 μm or less in a cumulative content of 20% to 30%, particles having a particle diameter of more than 10 μm and 27 μm or less in a cumulative content of 20 to 30%, particles having a particle diameter of more than 27 μm and 60 μm or less in a cumulative content of 25 to 35%, and particles having a particle diameter of more than 60 μm and 250 μm or less in a cumulative content of 15 to 25%, based on a total number of the ammonium metavanadate powder particles.