| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D203-16 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C237-06 |
| filingDate |
1997-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d78bddfbb3774290d452a0281496a825
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44ed9ebf38da87d4be9eea8f2b980656
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c1ef0e0baa9a529cc6bb1fa7d86ee3e2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2407bf98de9b858c240513ac49bfe683
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_697885765f7cdb34a6ad2e2adb3e8c4e |
| publicationDate |
1999-04-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CZ-9899-A3 |
| titleOfInvention |
Process for preparing caprolactam from 6-aminocapronitrile |
| abstract |
The invention concerns the preparation of caprolactam by cyclizing 6-aminocapronitrile in the presence of water at high temperature and optionally of a catalyst and a solvent by: a) separating from the reaction yield ("reaction yield I") of the cyclizing process caprolactam and all the components boiling higher than caprolactam ("high boilers"); b) treating the high boilers from step a) with phosphoric acid and/or polyphosphoric acid at a temperature ranging from 200 to 350 DEG C, obtaining reaction yield II; and c) separating the caprolactam resulting from reaction yield II of step b) and optionally 6-aminocapronitrile from unreacted "high boilers" and the acid used. |
| priorityDate |
1996-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |