http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114671770-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dd3225909d2407387f76b29bc867f700 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C213-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C217-90 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C213-02 |
| filingDate | 2021-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d9feee845915a778de1b8e9452326b1d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d71a060bc9cfae726548eb286d67fdaf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d4826b377edda66caefaad4d84a542df http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b86a645f10a113ca593c5769b1255e35 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7c65aa4ebea83f04a1f74a9f84d37afc http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4f77bd54a4d23eab9382b5bc931b6380 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ada443bb28a19355e09389ed4ec43dc1 |
| publicationDate | 2022-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114671770-A |
| titleOfInvention | A kind of production method of 4,4`-diaminodiphenyl ether |
| abstract | The invention discloses a production method of 4,4'-diaminodiphenyl ether, and relates to the technical field of hydrogenation synthesis of aromatic nitro compounds; the production method of 4,4'-diaminodiphenyl ether of the present invention, firstly The method of vacuuming the solvent is used to discharge the trace oxygen dissolved in the solvent, which solves the problem that the residual oxygen in the solvent cannot be replaced by simply using nitrogen, thereby inhibiting the oxidation of hydroxylamine and azobenzene in the process of nitro hydrogenation, avoiding the product The color becomes darker and the amount of impurities increases; secondly, a specific inert poor solvent is used for crystallization. On the one hand, it can prevent the side reaction between the amino compound and the solvent, and on the other hand, the inert solvent can crystallize the product from the reaction solvent, but the reaction The impurities remain in the solvent, thereby improving the purity of the product; in addition, the addition of a reducing agent can prevent the oxidation of the amino group by a very small amount of oxygen radicals in the solvent and nitrogen, which affects the color of the product, so as to ensure the color stability of the amino compound. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-116444353-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-116444353-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2023098203-A1 |
| priorityDate | 2021-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.