http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107118174-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D271-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D271-08 |
| filingDate | 2017-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2019-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2019-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107118174-B |
| titleOfInvention | A kind of preparation method of 3,4- dicyano furoxan |
| abstract | The invention discloses one kind 3, the preparation method of 4- dicyano furoxan (DCFO), specifically nitric-sulfuric acid is added in the methylene chloride dispersion liquid of cyanoacetic acid, continue mix round to complete reaction, then cools down, continuously cold water is added in reaction system, again through extraction liquid separation separation solvent phase and water phase, solvent is mutually washed to neutrality with saturated salt solution, solvent mutually isolates 3,4- dicyano furoxan solid product after drying, filtering, solvent recovery.The present invention replaces trifluoroacetic acid reaction medium using methylene chloride, significantly improves object yield, easy to operation, raw material is easy to get, and cost is relatively low.Mixed acid nitrification agent is added drop-wise in non-reactive medium, it can exclude influence of the moisture to reaction in raw material, a possibility that side reaction occurs is reduced, and keeps the heat discharged in acid adding and reaction process more timely and equably spreads, improves the yield of process safety and target product. |
| priorityDate | 2017-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.