| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E60-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M4-139
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M4-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-263
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-273 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M4-139
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M4-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-273
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-267
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-263 |
| filingDate |
2016-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2018-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_912b209ae3de9ece6e0de6281ad5df2c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_46c3fb2ce42a62b9f064505c27fd910b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0e0c172b05d6fbe3427135e5b1104121 |
| publicationDate |
2018-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-9923194-B2 |
| titleOfInvention |
Process for purifying N-alkylpyrrolidones |
| abstract |
Process for purifying N-alkylpyrrolidones which due to a previous use comprise at least one of the impurities of the formula I or II n nwhere R is hydrogen or a C1-C20-alkyl group,n nwhereinn a basic compound is added to the N-alkylpyrrolidone to be purified and the temperature of the mixture is at least 80° C. not more than 20 minutes after addition of the basic compound and N-alkylpyrrolidone is distilled off from the mixture obtained. |
| priorityDate |
2012-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |