http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110862362-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07B2200-13 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-33 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33 |
| filingDate | 2019-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-04-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110862362-B |
| titleOfInvention | Refining method of D-pantoic acid lactone |
| abstract | The invention relates to a refining method of D-pantoic acid lactone, which comprises the following steps: mixing a D-pantoic acid lactone crude product with a specific rotation degree of more than-45.0 degrees with ethyl acetate, heating to fully dissolve, controlling the temperature to be 20-30 ℃, adding D-pantoic acid lactone seed crystals with a specific rotation degree of-45.0 degrees to-50.7 degrees, slowly cooling to 5-10 ℃, preserving heat for crystallization, filtering, and collecting crystals. The refining method of D-pantoic acid lactone provided by the invention has the advantages of easily available raw materials, environment-friendly and safe conditions, short reaction time, recoverable solvent, simple steps and the like, and the obtained product has large and uniform crystals, specific rotation of-49.5 degrees to-50.5 degrees and purity of 98.0 percent, and has great industrial utilization value. |
| priorityDate | 2019-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.