Method of producing epsilon-caprolactam
US10364218B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Sep 8, 2016 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Sep 8, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of producing ε-caprolactam from 3-oxoadipic acid includes: step 1 of mixing at least one selected from the group consisting of 3-oxoadipic acid and salts thereof with a catalyst and a solvent in the presence of hydrogen to produce 3-hydroxyadipic acid; and step 2 of reacting the 3-hydroxyadipic acid which is a product of step 1, a salt or carboxylic acid derivative thereof, or a mixture of these with hydrogen and ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.