http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109988102-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-61 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-61 |
| filingDate | 2019-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109988102-B |
| titleOfInvention | Preparation method of 2, 3-dichloro-5-trifluoromethylpyridine |
| abstract | The invention discloses a preparation method of 2, 3-dichloro-5-trifluoromethylpyridine, which comprises the following steps: (1) firstly, filling a catalyst into a reaction tube, and then installing the reaction tube on a fixed bed; (2) introducing mixed gas of nitrogen and hydrogen, heating the reaction tube and preserving heat; (3) closing the hydrogen, continuously introducing nitrogen and cooling to the reaction temperature; (4) stopping nitrogen, simultaneously pumping raw materials of 2-chloro-5-trifluoromethylpyridine and a solvent into the reaction tube, and introducing chlorine; (5) 2, 3-dichloro-5-trifluoromethylpyridine can be obtained by reacting the raw material 2-chloro-5-trifluoromethylpyridine with chlorine at high temperature. The invention uses 2-chloro-5-trifluoromethyl pyridine and chlorine as raw materials, adopts the formed catalyst to carry out chlorination reaction, and has simple process, convenient operation and high conversion rate. |
| priorityDate | 2019-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.