| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for obtaining a highly active regenerated catalyst by sufficiently restoring the activity of a heteropoly acid-based catalyst containing phosphorus, molybdenum and vanadium and used in a vapor phase catalytic oxidation reaction of methacrolein. <P>SOLUTION: The method comprises carrying out a heat treatment of the heteropoly acid-based catalyst at 290-400°C under the stream of a gas containing ≥3 vol.% of molecular oxygen and ≥3 vol.% of water vapor. <P>COPYRIGHT: (C)2004,JPO |
