http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1375481-A4
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> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_49546da8141f5be8c45fb59d5de051b8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c706784e31a495ef06e53a3d3845618b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4baba054c0d661c758c1198d61ff8bfa |
| publicationDate | 2008-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1375481-A4 |
| titleOfInvention | CLEANING PROCEDURE FOR N- (2-HYDROXYETHYL) -2-PYRROLIDONE |
| abstract | A method by which N-(2-hydroxyethyl)-2-pyrrolidone having a high purity sufficient to enable the compound to be used as an intermediate for N-vinyl-2-pyrrolidone is obtained from a liquid reaction mixture obtained by reacting η-butyrolactone with 2-aminoethanol, i.e., a liquid comprising N-(2-hydroxyethyl)-2-pyrrolidone, one or more compounds having a lower boiling point than N-(2-hydroxyethyl)-2-pyrrolidone, and one or more compounds having a higher boiling point than N-(2-hydroxyethyl)-2-pyrrolidone. The method is characterized by distilling the liquid reaction mixture with a distillation column to thereby obtain through the column top a distillate comprising N-(2-hydroxyethyl)-2-pyrrolidone and compounds having a lower boiling point than it and obtain a bottom liquid comprising compounds having a higher boiling point than N-(2-hydroxyethyl)-2-pyrrolidone. |
| 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: 25.