http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6726811-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7f9af914ed2fb00cd4f1b8b1a28964e4 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S203-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-27 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-27 |
| filingDate | 2002-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4baba054c0d661c758c1198d61ff8bfa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c706784e31a495ef06e53a3d3845618b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_49546da8141f5be8c45fb59d5de051b8 |
| publicationDate | 2004-04-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6726811-B2 |
| titleOfInvention | Method of purifying N-(2-hydroxyethy)-2-pyrrolidone |
| abstract | A method for obtaining high purity N-(2-hydroxyethyl)-2-pyrrolidone satisfactory for use as an intermediate material for N-vinyl-2-pyrrolidone from a reaction liquid formed of a reaction between y-butyrolactone and 2-aminoethanol, i.e., a liquid containing N-(2-hydroxyethyl)-2-pyrrolidone, compounds having boiling points lower than that of N-(2-hydroxyethyl)-2-pyrrolidone and compounds having boiling points higher than that of N-(2-hydroxyethyl)-2-pyrrolidone. The method is characterized by distilling said reaction liquid using a distillation column, whereby obtaining a liquid containing the compounds having the lower boiling points than that of N-(2-hydroxyethyl)-2-pyrrolidone and N-(2-hydroxyethyl)-2-pyrrolidone as a distillate liquid from the column top and a liquid containing compounds having boiling points higher than that of N-(2-hydroxyethyl)-2-pyrrolidone as a bottom liquid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7037412-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7238260-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006086602-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2003176712-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101144268-B1 |
| priorityDate | 2001-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.