http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2021036384-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_31b6d77acf22d04c91bf88a65bb84fc5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fabe4208d52ae15bd5425010e6329783 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12P7-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12P7-02 |
| filingDate | 2020-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d160be307fe488b2476de758304d1230 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_73588dd10866c3dbcd02202207be361a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0efa7d51233fd03b47f6c7781e207996 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e25207513dfe2eb3537cd03e0120f6ba http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ba33f4f92f94d78d78c1fa353e5c855 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a44ee65ab48d43effd84936536b098ef |
| publicationDate | 2021-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2021036384-A1 |
| titleOfInvention | Method for purifying vitamin d3 |
| abstract | Disclosed is a method for purifying vitamin D3, the method involving: mixing crude vitamin D3 as a substrate with a weak organic acid or anhydride in a non-aqueous solvent, subjecting same to esterification with lipase column A and extraction with an extractant, concentrating the resulting organic layer, then adding a crystallization solvent to dissolve same, then reducing the temperature for crystallization, and filtering and drying same to obtain a vitamin D3 ester crystal; re-dissolving same, subjecting same to saponification with lipase column B and extraction, returning the resulting organic layer to the lipase column B for saponification and extracting same, and continuing the cycle until the vitamin D3 ester residue in the organic layer is < 1 wt%; finally subjecting the organic layer to concentration, crystallization and drying to obtain a fine vitamin 3 crystal; and treating the crystallization mother liquor for reuse as the substrate. |
| priorityDate | 2019-08-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 121.