Process for preparing caprolactam and polyamides therefrom
US9073867B2 · kind B2 · utility
3Cited by
26References
58Claims
0Family size
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Key dates
| Filing date | Apr 9, 2012 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jun 8, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Provided herein are processes for preparing caprolactam from a starting material such as one or more of the cis,cis-, cis,trans- and trans,trans-double-bond isomers of muconamide, muconic acid ester, or muconic acid. The starting material, intermediates, and caprolactam prepared therefrom can contain carbon atoms derived from biomass containing detectable 14C content determined according to ASTM D6866 and optionally containing a 14C content up to 0.0000000001% (one part per trillion). Caprolactam so prepared can be used to make various polyamides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.