Process for the preparation of lactams
US5723603A · kind A · utility
6Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jun 17, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of lactams from dinitriles. It consists more precisely of a process for the preparation of lactam, linking two stages in series, one of hemihydrogenation of dinitrile to aminonitrile, the other of cyclizing hydrolysis of the aminonitrile after only one simple purification operation. Aliphatic lactams, such as especially epsilon-caprolactam, are base compounds for the preparation of polyamides (polyamide 6 from caprolactam).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.