Method for producing ε-caprolactam
US12365652B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Nov 18, 2020 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Jun 6, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C227/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a method of producing ε-caprolactam, the method including the following steps (A) and (B): (A) a step of reacting 5-cyanovaleramide with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst to obtain a 5-cyanovaleramide hydrogenation reaction mixture; (B) a step of heating the 5-cyanovaleramide hydrogenation reaction mixture at a temperature of 180° C. or higher and 300° C. or lower in an aqueous solvent to obtain ε-caprolactam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.