| abstract |
(57) [Abstract] (with correction) [PROBLEMS] To add ammonia to exhaust gas containing NO X and SO X at the same time, and carry out SO 3 Provided is a catalyst for removing nitrogen oxides, which has a low conversion rate to nitrogen and has excellent durability. SOLUTION: A mixed aqueous solution of a soluble titanium compound, a soluble silicon compound and / or a silica sol, or Further, a slurry obtained by neutralizing a mixed aqueous solution to which a soluble tungsten compound is added, a mixed aqueous solution of a metatitanic acid slurry and a soluble silicon compound and / or a silica sol, or a mixed aqueous solution to which a soluble tungsten compound is further added is obtained. A catalyst for removing nitrogen oxides containing the obtained composite oxide (component A) and an oxide of at least one metal selected from the group consisting of vanadium, molybdenum and tungsten (component B) using the obtained slurry. Its manufacturing method. |