| 摘要 |
PROBLEM TO BE SOLVED: To improve catalytic performance obtd. by a method wherein an aqueous slurry contg. catalytic ingredients is dried and then, it is calcined and a wet-shaped body obtd. by wet shaping of the calcined product obtd. is dried by using both microwave and hot air. SOLUTION: An aqueous slurry contg. catalytic ingredients is prepd. by a method such as precipitation method and oxide mixing method. As the raw material of the catalytic ingredient, oxides, sulfates, nitrates, etc., of each catalytic element can be used by combining them. The aqueous slurry contg. the catalytic ingredients is dried by using a spray dryer, etc. The mean particle diameter of spherical particles obtd. is pref. 35-90 μm. The dried powder obtd. is calcined. Calcining is performed in a temp. range of 200-600 deg.C and calcining hr is appropriately selected in accordance with the aimed catalyst. Successively, the calcined product obtd. is incorporated with water and the mixture is shaped into an arbitrary shape such as spherical and ring-like shapes by using an extrusion molding machine, etc. The wet-shaped product obtd. is dried by using both microwave and hot air. Temp. of the hot air is pref. 60-150 deg.C. |
