Method for reactivating a catalyst for cyclizing hydrolysis of an aminonitrile into a lactam and use of the regenerated catalyst for making lactams
US6677448B1 · kind B1 · utility
1Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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° C. and 600° C. with an oxidizing atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.