http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107778160-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-68 |
| filingDate | 2016-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107778160-B |
| titleOfInvention | Preparation method of 3,4,5, 6-tetrafluorophthalic acid |
| abstract | The invention provides a preparation method of 3,4,5, 6-tetrafluorophthalic acid, which comprises the steps of hydrolyzing N-methyltetrafluorophthalimide at the temperature of 30-90 ℃ under the action of low-concentration acid and a catalyst to generate the 3,4,5, 6-tetrafluorophthalic acid, and directly recycling suction filtration mother liquor for the next hydrolysis reaction. By adopting the technical scheme of the invention, the use of high-concentration acid and the generation of a large amount of waste acid are avoided, the environmental protection pressure is greatly reduced, the product yield is improved, the product quality is better, and the production cost is also obviously reduced. |
| priorityDate | 2016-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.