http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112341424-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-46 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-46 |
| filingDate | 2020-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112341424-B |
| titleOfInvention | Synthesis method of 4-hydroxy-2, 2-dimethyl-1, 3-benzodioxole |
| abstract | The invention discloses a method for synthesizing 4-hydroxy-2, 2-dimethyl-1, 3-benzodioxole, which takes pyrogallic acid and 2-methoxypropene as raw materials, takes methylbenzene or dimethylbenzene as a solvent, and carries out reaction at 110-135 ℃, a by-product methanol is separated from the entrained solvent by gas phase separation in the reaction process, the separated methanol is recovered by condensation, the separated solvent returns to a reaction system, and the 4-hydroxy-2, 2-dimethyl-1, 3-benzodioxole is obtained after the reaction is finished. The product content reaches 99.0-99.6%, and the yield reaches 88.1-90.5%. The synthetic method disclosed by the invention is simple to operate and high in reaction selectivity, the generation of a byproduct methanol is reduced by 50% from the source, the generation probability of impurities is reduced, the three wastes are greatly reduced, and the synthetic cost is greatly reduced. |
| priorityDate | 2020-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.