| 摘要 |
PURPOSE: To provide a dehydrooxidation catalyst developing sufficient catalytic activity and selectivity and having stable catalyst life. CONSTITUTION: A dehydrooxidation catalyst contains a crystalline multiple iron phosphate compd. (B) obtained by baking a crystalline compd. (A) being a multiple iron phosphate compd. based on iron and phosphorus oxide and having characteristic X-ray diffraction peaks at 2θ=19.1 deg., 20.3 deg., 24.6 deg., 31.8 deg. in an X-ray crystal diffraction spectrum (twin cathode: Cu-Kα). |
