| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a22da5b7dd6ed60a21538e5edb23e051 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C233-16 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-16 |
| filingDate |
1983-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1984-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7b9de62676e25a10b32194434ce95135
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d8a7b2d42cb9f397e5ba15966a026cd6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d2ad14b7a73b18d15c1fdae0a5f77e0 |
| publicationDate |
1984-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4474985-A |
| titleOfInvention |
Purification of N-acetyl aminophenols |
| abstract |
A process for increasing the color-free shelf life of a crude N-acetyl aminophenol prepared by the acetylation of an aminophenol wherein the N-acetyl aminophenol contains color-forming impurities which are the products of oxidation of the aminophenol and other side reactions. The process comprises dissolving the crude N-acetyl aminophenol in a solvent containing a reducing agent, heating the solution at about the boiling point, crystallizing the N-acetyl aminophenol from the solution, washing the crystalline N-acetyl aminophenol with solvent containing reducing agent and thereafter separating and drying the crystalline N-acetyl aminophenol. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0484153-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5344979-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6846495-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2668500-C2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2020097091-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0320484-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0320484-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9102589-B2 |
| priorityDate |
1981-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |