http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1565435-B1
Outgoing Links
| 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/C07D201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16 |
| filingDate | 2003-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2006-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1a81a5e3f9c07705b4b280b60ccb1bfb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1c7908a604a64c739bceb7e5e926ff60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_afa07a647d3ed087705fbdb7a13cc97c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cf128408c7ec2c0fbf80c8003b655beb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_52fed5c6f611fe4952ab620581769c43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92360cf942b3ab9113cfae4e6a31b253 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_872007423bd16471c4389b4cb93762f5 |
| publicationDate | 2006-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1565435-B1 |
| titleOfInvention | Method for purifying caprolactam |
| abstract | The invention relates to a method for purifying crude caprolactam that has been obtained by: 1) reacting a mixture (I) containing 6-aminocapronitrile and water to form a mixture (II) containing caprolactam, ammonia, water, high boilers and low boilers in the presence of a catalyst followed by; 2) removing ammonia from mixture (II) while obtaining a mixture (III) that contains caprolactam, water, high boilers and low boilers, after which; 3) water is entirely or partially removed from mixture (III) while obtaining a crude caprolactam (IV) that contains caprolactam, high boilers and low boilers. The inventive method is characterized in that: a) the crude caprolactam and an inorganic acid, which has a boiling point higher that that of caprolactam under distillation conditions in accordance with subsequent steps b) to h), are fed to a first distillation device K1; b) the crude caprolactam and the inorganic acid are distilled in the first distillation device K1 during which a first partial flow in the bottom area and a second partial flow in the top area are withdrawn from the distillation device K1; c) the second partial flow from step b) is fed to a second distillation device K2; d) the second partial flow from step b) is distilled in the second distillation device K2 during which a first partial flow in the bottom area and a second partial flow in the top area are withdrawn from the distillation device K2; e) a first partial flow from step d) is fed to a third distillation device K3; f) the first partial flow from step d) is distilled in the third distillation device K3 during which a first partial flow in the bottom area and purified caprolactam in the top area are withdrawn from the distillation device K3, and; g) the first partial flow from step f) is fed to the first distillation device K1. |
| priorityDate | 2002-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 141.