| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_29f3339f64d8daf860f9fae1d7803920 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-08 |
| filingDate |
1983-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1989-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_93c1ede4ced79d370d536945cca227aa |
| publicationDate |
1989-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4798909-A |
| titleOfInvention |
Process for recovery of polyarylpolyamines |
| abstract |
An arylamine such as aniline is condensed with formaldehyde in the presence of aqueous hydrochloric acid to form a mass containing the hydrogen chloride salt of a polyarylpolyamine. The mass is contacted with additional aniline thereby forming an organic phase and an aqueous phase, the 4,4'-polyarylpolyamine overwhelmingly being liberated from its salt form in the aqueous phase and being transferred to the organic phase. High recoveries of the 4,4'-diamino polycondensate are achieved. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010204510-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6627086-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007007090-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8318971-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9217054-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8557949-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009240076-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2013057069-A1 |
| priorityDate |
1973-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |