| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_76ae7a27fa953da4cdb03c43b7b49ff8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_36c7b5b627d90b07643a1b50000f9bfe
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_840601cb3ac0ca6c11183506b003f43e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_89eab1e56836fc5ca949ec504e033b48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_669676d736f91e595f98b7374397fec8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C211-55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-62 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-55
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78 |
| filingDate |
2010-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1715e63468838bc8fe8759097f6e46fb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3d6e8f667545a15715e224deb1daef1b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c75cfe363c92ef42ef34b78c2aa56c37
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ca3a2361b3d67ffaf8d69b944b8ef4a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0b57c00061c6f3297b2f7a6981ff987 |
| publicationDate |
2012-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2012035396-A1 |
| titleOfInvention |
Process for preparing mda via the stage of the aminal |
| abstract |
The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c):n a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, nn which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH 2 O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9815769-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115181027-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016068474-A1 |
| priorityDate |
2009-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |