| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-14 |
| filingDate |
2003-11-11^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2009-03-10^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_afa07a647d3ed087705fbdb7a13cc97c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70b4959861504cb3431e895a7b24b789
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92360cf942b3ab9113cfae4e6a31b253
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c7908a604a64c739bceb7e5e926ff60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf128408c7ec2c0fbf80c8003b655beb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_872007423bd16471c4389b4cb93762f5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1a81a5e3f9c07705b4b280b60ccb1bfb |
| publicationDate |
2009-03-10^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7501047-B2 |
| titleOfInvention |
Method for purifying caprolactam |
| abstract |
The disclosure relates to a process for purifying crude caprolactam. The process involves converting a first mixture of 6-amino capronitrile and water to a second mixture of caprolactam ammonia, water, high boilers and low boilers using a catalyst. The ammonia is removed from the second mixture to obtain a third mixture. Water is removed from the third mixture to give crude caprolactam, high boiler and low boilers. Purified caprolactam is then obtained by a series of distillation steps. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9902700-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9518024-B2 |
| priorityDate |
2002-11-13^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |