| Predicate |
Object |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-267 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-26 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-267 |
| filingDate |
2001-05-25^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1df32e16376d0a13afca3ae698a5de92
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_99823f5d012fdff00dbcb84caa9a143b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e5c13aa0a572ee82f49cc2ab24cffe1d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c12b6e54811e05e6377ca16b74840d56 |
| publicationDate |
2003-09-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2003166947-A1 |
| titleOfInvention |
Method for obtaining pure n-vinyl pyrrolidone |
| abstract |
The invention describes a process for the isolation of pure N-vinylpyrrolidone from N-vinylpyrrolidone-containing crude products, comprising a single-stage or multistage crystallization process, which comprises passing the mother liquor from the first crystallization stage either to a distillative and/or extractive purification, or returning it to an N-vinylpyrrolidone-containing product stream of the preparation process. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9878979-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011218344-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009088579-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9096516-B2 |
| priorityDate |
2000-05-26^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |