http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2261832-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f66694c501147990420510b2425765af |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D203-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D203-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-34 |
| filingDate | 1997-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a5e1ca615ee65899c4ec554e9ce64f74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6998186fdbb67ebe95d0b5889f2c9767 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e639b2093ba37e521387914c0b73683b |
| publicationDate | 2002-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2261832-C |
| titleOfInvention | Method for purifying lactams |
| abstract | The present invention relates to the purification of lactams by extraction liquid-liquid and / or treatment with ion exchange resin. It consists in a process for purifying a lactam from cyclizing hydrolysis in the vapor phase of an aliphatic aminonitrile, characterized in that, after having eliminated most of the ammonia it contains, we submit said lactam to liquid-liquid extraction using a solvent comprising a solvent of an acidic nature and / or the said lactam is brought into contact with a cation exchange resin. It is best for most applications of said lactam to precede or complete the stage of liquid-liquid extraction and / or the step of passage over acid resin by a hydrogenation step of the compounds of the lactam solution, comprising unsaturated. The purification process can also include a step oxidation supplementing or replacing the hydrogenation step. Finally, the process is preferably completed by distillation in the presence of a based. |
| priorityDate | 1996-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 65.