Method for producing a catalyst and a carrier therefor

A method for producing a catalytic material for the reduction of nitrogen oxides in the presence of ammonia, which consists essentially of admixing:

• (a) a slurry prepared by beating at least one of inorganic heat-resistant fibers of about 1-20 mm in fiber length and of about 0.1-30 microns in diameter selected from the group consisting of asbestos fiber, silica fiber, silica-alumina fiber, chrysotile fiber, rock wool, glass fiber, anthophyllite fiber, potassium titanate fiber, carbon fiber and ceramic fiber, in water,
• (b) at least one powdery catalytic material having a particle size of about 0.01 to 50 microns and being an oxide selected from the group consisting of Cu, Fe, V, W and Mo or precursor thereof which is a water-insoluble, powdery compound which will be converted into catalytic material when calcined and,
• (c) a powdery carrier material which is at least one oxide of a metal selected from the group consisting of Ti and Al or a precursor which is a water-insoluble, powdery compound which will be converted into the oxide when calcined,
• thereby forming a stock material containing solid components in an amount of 1 to 10% by weight with about 80 to 40 parts by weight of fibers in relation to 20 to 60 parts by weight of the total powdery material, forming the stock into a sheet by paper-making means and drying the sheet.