| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_37b6263b75377d4dae467974a791d1f2 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-02 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-51 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-02 |
| filingDate |
1999-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2000-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0a5faf1f4d52d3a29cc5d1ff4201a36f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e80e9bf0a993babc614de579843c30b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f74f759a51d947a0998799a77c3d4cd7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e4cbca17d55c51f7126bdaad32c980e |
| publicationDate |
2000-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6140538-A |
| titleOfInvention |
Process for preparing 4-aminodiphenylamines |
| abstract |
A process for preparing an optionally substituted 4-aminodiphenylamine comprising reacting an optionally substituted aniline and an optionally substituted nitrobenzene in the presence of water and a base while controlling the water content so as to ensure a molar ratio of water to the base charged of not less than about 4:1 at the start of the coupling reaction and not less than about 0.6:1 at the end of the coupling reaction to produce 4-nitrodiphenylamine and/or 4-nitrosodiphenylamine and/or salts thereof. The coupling reaction is followed by a hydrogenation reaction where the coupling reaction product is hydrogenated in the presence of a hydrogenation catalyst and added water so as to ensure a molar ratio of total water to base of at least about 4:1 at the end of hydrogenation. Aqueous and organic phases are obtained and the optionally substituted 4-aminodiphenylamine recovered from the organic phase. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03033121-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8686188-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2008039657-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9029603-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7176333-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009048465-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006247473-A1
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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9302259-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100406107-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007227675-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7824538-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004110986-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7504539-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013132290-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7235694-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8293673-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023028524-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005006252-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013153419-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005240058-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011226606-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004039181-A1 |
| priorityDate |
1998-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |