| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_387abf6afc9a2cd5cfa5cd4d35f8b9fe |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C211-55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C211-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C211-50 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-60 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-48 |
| filingDate |
2017-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba15b456d70683a6c2030b6c77789390
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fdd9fb1e8bc3d9c05fb063deec3487c4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_53dd6d1af28c9a53613b4e5cf0f80c85
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7958be12045dc3b04831aaec380a0bb2 |
| publicationDate |
2019-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-3558926-A1 |
| titleOfInvention |
Method of producing diamines and polyamines of the diphenylmethane series |
| abstract |
The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, by condensing aniline and formaldehyde followed by an acid-catalysed rearrangement at different production capacities with alteration of the isomer composition in the resulting diamines of the diphenylmethane series (altering the 2,4'-MDA content). Adapting the molar ratios of the total used aniline to the total used formaldehyde and of the total used acid catalyst to the total used aniline, and adapting the reaction temperature, allows the rearrangement reaction to be fully completed despite the change in dwell time inevitably associated with a change in production capacity, and allows the formation of undesired by-products to be avoided as far as possible; the intended modification to binuclear content is likewise achieved. |
| priorityDate |
2016-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |