http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111559995-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D407-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D407-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-62 |
| filingDate | 2020-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-08-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111559995-B |
| titleOfInvention | A kind of preparation technology of ascorbic acid ethyl ether |
| abstract | The invention relates to a preparation process of ascorbic acid ethyl ether, which takes ascorbic acid and acetone as raw materials, reacts under the catalysis of oxalyl chloride for 8-10 hours, filters, washes and is dried to obtain 5,6-O-isopropylidene-L-L- Ascorbic acid; alkaline earth metal oxides are added to the mother liquor to remove oxalic acid, hydrogen chloride and moisture, and the acetone can be reused after being dried by molecular sieves; ethylating reagent, inorganic base, 5,6-O-isopropylidene-L-ascorbic acid are dissolved In ethanol, react at 40-60°C for 6-8 hours, and purify to obtain 3-ethyl-5,6-O-isopropylidene-L-ascorbic acid; remove the isopropylidene protecting group by hydrogen chloride alcohol solution The mixture was concentrated, and recrystallized by adding a solvent with low solubility to obtain ascorbic acid ethyl ether. The process solves the problem of acetone recovery and application, does not use toxic and harmful solvents and organic bases, does not generate a large amount of waste liquid, and is economical and environmentally friendly; the process is easy to control, the yield is high, and it is easy to industrialize. |
| priorityDate | 2020-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 77.