http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109851509-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50 |
| filingDate | 2018-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109851509-B |
| titleOfInvention | Preparation method of 4, 4' -diaminodiphenylmethane |
| abstract | The invention relates to the field of chemistry and chemical engineering, and particularly discloses a preparation method of 4, 4' -diaminodiphenylmethane. The preparation method of the 4, 4' -diaminodiphenylmethane is characterized by comprising the following steps: placing cation exchange resin, aniline, and 37% formaldehyde aqueous solution or paraformaldehyde solid in a reaction kettle, and sealing the reactor; under the protection of nitrogen, setting the reaction temperature to be 60-180 ℃, the reaction time to be 2-16h, and the stirring speed to be 100-1200r/min, and carrying out the synthesis reaction; after the reaction is finished, separating the reaction product from the ionic resin, rectifying and purifying the reaction product to obtain a product, and recycling the ionic resin and unreacted aniline. The invention is not only suitable for the synthesis process taking the aqueous solution of formaldehyde as the raw material, but also suitable for the synthesis process taking paraformaldehyde as the raw material, and greatly improves the convenience of raw material transportation and the safety of use. |
| priorityDate | 2018-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.