http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103420844-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5f2c23a543ebe192f369de8d3d8d9180 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50 |
| filingDate | 2013-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f88b6ad372a7b043473f86a6720f94e4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b34e6f0fa4253698351e2213ab91f423 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fa70a0acaece1ce2f4ee0b686cb9237f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b45e911ace09865ea4fea477ea98cb2 |
| publicationDate | 2014-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103420844-B |
| titleOfInvention | Process for preparing 4,4'-diaminodiphenylmethane through condensation of acidic ionic liquid catalytic aniline and formaldehyde |
| abstract | The invention provides a process for preparing 4,4'-diaminodiphenylmethane (4,4-MDA) through condensation of acidic ionic liquid catalytic aniline and formaldehyde. The process includes the first step of adding aniline and acidic ionic liquid into a reactor provided with a backflow condensing device, dropwise adding a formalin solution into the reactor at 30-60 DEG C, stirring the mixture for 5-45 minutes, and then raising the temperature to 60-120 DEG C to react for 2-10 hours, wherein the raw material molar ratio is that aniline: formaldehyde=2-10: 1, and the catalyst mass ratio is that the acidic ionic liquid: the formaldehyde=0.5-10: 1, the second step of using water to extract reaction liquid, obtaining a water layer and an organic layer through separation, carrying out spin-steaming on the water layer, and recycling the ionic liquid for repeat use. The process is mild in reaction condition, high in catalyst activity and good in selectivity, and the prepared 4,4'-diaminodiphenylmethane can be repeatedly used. |
| priorityDate | 2013-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 39.