| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e1bf06f55de84b78abc9a057807f7eb |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-12 |
| filingDate |
1997-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b994aeb28f48bd0e8deebb44656b8692
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5a4ee92ac8b98ade650456ecafa7e54c |
| publicationDate |
1998-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-H10287645-A |
| titleOfInvention |
Recovered ε-caprolactam and purification method thereof |
| abstract |
(57) [Problem] To provide high-purity recovered ε-caprolactam that can be used at the same level as virgin ε-caprolactam. SOLUTION: An aqueous solution of ε-caprolactam depolymerized or extracted with hot water is concentrated to 90% by weight or more, and then recrystallized or distilled under reduced pressure at a pressure of 20 Torr or less / 150 ° C. or less to contain adipimide. A recovered ε-caprolactam having an amount of 3 ppm or less is obtained. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023074438-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023074433-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2021149815-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023074432-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2013119539-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021149815-A1 |
| priorityDate |
1997-04-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |