Sequential distillation process for removing tetrahydroazepine from aminocapronitrile and/or hexamethylenediamine
US5961788A · kind A · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Oct 9, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for removing tetrahydroazepine from aminocapronitrile or hexamethylenediamine by sequential distillation in which the overhead from the second distillation is combined with a fresh, incoming mixture of tetrahydroazepine and aminocapronitrile or hexamethylenediamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.