http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-4973832-B2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G73-02 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-08 |
| filingDate | 2005-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2012-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2012-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-4973832-B2 |
| titleOfInvention | Continuous production method of polymethylene polyphenyl polyamine |
| abstract | Disclosed is a process for continuous production of a polymethylene polyphenyl polyamine which can produce a polymethylene polyphenyl polyamine continuously by reacting aniline and formaldehyde in the presence of a hydrochloric acid catalyst. The process comprises: (A) a first condensation step in which aniline in an amount of 80-95% by mass relative to the total amount to be charged and a portion of the total amount of formaldehyde to be charged are reacted with each other in the presence of a hydrochloric acid catalyst under such conditions where the hydrogen chloride/aniline ratio (by mole) is 0.99 or less; (B) a second condensation step in which the reaction solution yielded in the first condensation step is mixed with the remainder of formaldehyde to react them with each other; and (C) an isomerization step in which the reaction solution yielded in the second condensation step is mixed with aniline in an amount of 5-20% by mass relative to the total amount to be charged to cause an isomerization reaction between them. According to the process, it becomes possible to produce a polymethylene polyphenyl polyamine which has a reduced N-methyl substance content to the similar level to that in a batch-wise process and contains methylene diphenyl diamine in an amount similar to that in a batch-wide process. |
| priorityDate | 2005-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.