Method for reactivating a catalyst for cyclizing hydrolysis of an aminonitrile into a lactam and use of the regenerated catalyst for making lactams
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United States of America Patent
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Jan 13, 2004
Grant Date -
N/A
app pub date -
Jun 11, 2001
filing date -
Jul 22, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a process for regenerating a catalyst for the cyclizing hydrolysis of an aminonitrile for the manufacture of lactams. It relates more particularly to the regeneration of the solid catalysts used in the processes for producing lactams by the cyclizing hydrolysis of aminonitriles. This regeneration process consists in treating the spent catalyst or the catalyst at the end of the cycle at a temperature of between 300.degree. C. and 600.degree. C. with an oxidizing atmosphere.
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