http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3933929-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2dbb2d7ecbd600cf89fbdd230f4a466c |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C205-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 |
| filingDate | 1973-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1976-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_10525282de04e3449595288c843e4980 |
| publicationDate | 1976-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3933929-A |
| titleOfInvention | Process for the purification of p-nitrophenol |
| abstract | In a purification process for p-nitrophenol obtained by nitration of phenol, separation of crude nitrophenols, steam distillation to remove o-nitrophenol, and cooling the broth obtained when it contains more than 0.5% sodium bisulphite and is at pH 5.4 to 6.4 to deposit crystals of p-nitrophenol, an improvement consists in stirring the crystals with water at 55 DEG -85 DEG C to give a mixture containing 10-40% excess of p-nitrophenol over the solubility at that temperature, separating the upper layer of p-nitrophenol in water obtained, cooling it to 40 DEG -50 DEG C and separating the layer of water in p-nitrophenol, cooling the latter to below 30 DEG C and collecting the crystals deposited. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021219647-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-3109581-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-3109580-A1 |
| priorityDate | 1972-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.