http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109761949-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-20 |
| filingDate | 2019-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109761949-B |
| titleOfInvention | Industrial preparation method of 2, 2-dimethyl-4-hydroxymethyl-1, 3-dioxolane |
| abstract | The invention discloses an industrial preparation method of 2, 2-dimethyl-4-hydroxymethyl-1, 3-dioxolane, which comprises the following steps: (1) and (3) preparing carboxylic acid monopropylene triol ester by esterification: glycerol and carboxylic acid are taken as raw materials, and dehydration reaction is carried out for 0.5-4h at 90-150 ℃ under the condition of an acid catalyst to obtain carboxylic acid monopropanol ester; (2) and ketal cyclization reaction: carboxylic acid monopropylene triol ester and acetone are subjected to cyclization reaction for 0.5 to 3 hours at the temperature of between 20 and 50 ℃ under the condition of an acid catalyst to obtain a cyclization intermediate product; (3) and (3) hydrolysis reaction: and (3) adding the intermediate product obtained in the step (2) into an alkaline solution, and reacting for 0.5-1h at the temperature of 20-50 ℃ to obtain the product. The industrial preparation method of the 2, 2-dimethyl-4-hydroxymethyl-1, 3-dioxolane has the characteristics of green and environment-friendly process, high selectivity of chemical reaction and high conversion rate of raw materials. |
| priorityDate | 2018-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.