http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108373415-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C201-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C205-43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C201-08 |
| filingDate | 2018-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108373415-B |
| titleOfInvention | Preparation method of di (2, 4-dichloro-5-nitrophenyl) carbonate |
| abstract | The invention discloses a preparation method of di (2, 4-dichloro-5-nitrophenyl) carbonate. Adding bis (2, 4-dichlorophenyl) carbonate, a solid acid catalyst and a phase transfer catalyst into tetrachloroethylene serving as a solvent, stirring and mixing, cooling to below 5 ℃, dropwise adding concentrated nitric acid, controlling the temperature to be between 5 and 10 ℃, heating to 10 to 20 ℃ after dropwise adding, reacting for 2 to 5 hours, heating to 30 to 40 ℃, reacting for 3 to 6 hours, cooling to room temperature after the reaction is finished, filtering, and layering and desolventizing an organic phase to obtain bis (2, 4-dichloro-5-nitrophenyl) carbonate. The method takes tetrachloroethylene as a solvent, and the di (2, 4-dichlorophenyl) carbonate reacts with nitric acid under the catalysis of a solid acid catalyst, so that the pollution of waste mixed acid generated by the traditional nitration method to the environment is fundamentally avoided, meanwhile, the selectivity of the nitration reaction is more effective, the yield of the di (2, 4-dichloro-5-nitrophenyl) carbonate is remarkably improved, the production cost is reduced, the pollution to the environment is reduced, and the method has wide application prospect in the industrial production of the oxadiazon. |
| priorityDate | 2018-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.