http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2743925-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e5421b664c7c22ec24417a9e81faa650 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C211-51 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78 |
| filingDate | 2020-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_10ac1c2d21ff2a342d9fb4e8b171be2e |
| publicationDate | 2021-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2743925-C1 |
| titleOfInvention | Method for producing methylened diphenyldiamine using a heterogeneous catalyst |
| abstract | FIELD: chemistry.SUBSTANCE: invention relates to a method for producing a product with a total content of methylenediphenyldiamine of at least 94% with a predominant content of the target 4,4'-methylenediphenyldiamine and a content of non-target 2,4-, 2,2'-methylenediphenyldiamine of less than 10 and 3 mass%, respectively, which can find application in the manufacture of varnishes, adhesives, synthetic leather and synthetic rubber. The method includes a stage of condensation of formaldehyde and excess aniline and two stages of isomerization of the resulting product on an ion-exchange resin based on a copolymer of divinylbenzene with styrene and propylene polymers. Precondensate is obtained by the interaction of aniline and formaldehyde in the presence of aluminum oxide (III) in an amount from 1*10-3to 8*10-3mol per 1 mol of aniline at a temperature of 50-80°С. The first stage of isomerization is carried out at a temperature of 100°C and the second stage of isomerization is carried out at a temperature of 120°C.EFFECT: increased service life of the heterogeneous catalyst.1 cl, 4 dwg |
| priorityDate | 2020-09-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.