| 摘要 |
<p>A novel extrusion-molded catalyst which is suitable for use in the syntheses of an unsaturated aldehyde and an unsaturated carboxylic acid through catalytic vapor-phase oxidation, is obtained by extrusion-molding catalyst particles (powder) containing at least molybdenum, bismuth, and iron as metal elements which catalyze these reactions, and is excellent in catalytic activity and in selectivity to the unsaturated aldehyde and unsaturated carboxylic acid as target compounds. Before catalyst particles prepared beforehand are extrusion-molded, ingredients such as, e.g., β-1,3-glucan and a liquid are added to the catalyst particles. The mixture is kneaded and then extrusion-molded through a catalyst passage at least part of which is made of a ceramic. Thereafter, the molding is subjected to treatments such as drying and burning to obtain a final extrusion-molded catalyst.</p> |
