Method for reactivating catalyst for methacrylic acid...

Details Method for reactivating catalyst for methacrylic acid... Method for reactivating catalyst for methacrylic acid...

2005-08-09

2005-08-09

Richter, Johann (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C562S543000

Reexamination Certificate

active

06927307

ABSTRACT:
This invention provides a method of reactivating a catalyst for methacrylic acid production, which catalyst is used in production of methacrylic acid through vapor-phase oxidation of methacrolein or vapor-phase oxidative dehydrogenation of isobutyric acid, contains P and Mo, and exhibits reduced activity. The process comprises treating the catalyst, whose activity level has dropped (deteriorated catalyst), with a gas containing a nitrogen-containing heterocyclic compound (e.g., pyridine, piperidine, piperazine, quinoline).

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patent: 60232247 (1985-11-01), None

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