Process for the continuous purification of crude .epsilon.-caprolactam
US6323341A · kind A · utility
4Cited by
4References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Sep 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D201/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the purification of crude .epsilon.-caprolactam, wherein crude .epsilon.-caprolactam prepared by cyclization of alkyl 6-aminocaproate, 6-aminocapronitrile, 6-aminocaproic acid, 6-aminocaproic amide and/or oligomers thereof, is subjected to a crystallization process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.