| abstract |
"catalyst for the preparation of unsaturated aldehyde and unsaturated carboxylic acid, and process for the vapor phase catalytic oxidation of isobutylene, tertiary butanol or propylene". A catalyst suitable for catalytic vapor phase oxidation of isobutylene, t-butanol or propylene to produce, respectively, unsaturated aldehyde and corresponding unsaturated carboxylic acid is provided. said catalyst consists of ring-shaped bodies composed of (i) a catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst has excellent mechanical strength, can provide the targeted products in high yield and exhibits little activity degradation over time. |