| 摘要 |
<p>A molded or supported catalyst excellent in mechanical strengths for use in synthesizing methacrolein and methacrylic acid from isobutylene or tert-butyl alcohol is produced by coating the surface of a molded or supported catalyst based on molybdenum, bismuth and iron with a highly depolymerizable organic polymer. The catalyst is used after removing the polymer by depolymerizing it by heating the catalyst in a reactor.</p> |
