Process to continuously prepare an aqueous mixture of episilon caprolactum and episilon caprolactum precursors
US5877314A · kind A · utility
5Cited by
6References
14Claims
0Family size
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Key dates
| Filing date | Feb 14, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Feb 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This continuous process for preparing an aqueous mixture of .di-elect cons.-caprolactam and 6-aminocaproic acid and/or 6-aminocaproamide by involves, as the reductive amination step, continuously contacting 5-formylvaleric acid or an alkyl 5-formylvalerate in water as solvent with hydrogen and an excess of ammonia in the presence of a ruthenium on carrier, as a catalyst, wherein the carrier is at least one of titanium oxide or zirconium oxide. The aqueous mixture can be used to prepare .di-elect cons.-caprolactam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.