http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103102351-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_89dce88fd1738357c3415d47576c33bf |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D475-04 |
| filingDate | 2013-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2015-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff0fc9ecbb9f66a6b4773b4682ee3969 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_af72744b01527407ab0717d691975e4b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c3f6001a17086e1dbed0e54136f865ae http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c178b646628aa8a4ebc747720a7c505 |
| publicationDate | 2015-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103102351-B |
| titleOfInvention | Refining method for preparing high-purity folic acid |
| abstract | The invention discloses a refining method for preparing high-purity folic acid. The method comprises the following steps: 1) dissolving acid, namely dissolving coarse folic acid by utilizing 15-25 percent of hydrochloric acid, adding water into the dissolved coarse folic acid solution, discharging, centrifuging, and directly drying to obtain an acid extract; 2) alkali dissolution refining, namely mixing the acid extract obtained in the acid dissolution step (1) and a solvent, adding an organic alkali solution to regulate the pH value to be 9.0-10.0, heating and raising the temperature to be 65-90 DEG C, adding an adsorbent, keeping the temperature at the temperature of 65-90 DEG C for 0.5-2 hours, and performing filter pressing to obtain alkali-soluble filtrate; and 3) regulating acid crystallization, namely adding the clarified alkali solution filtrate obtained in the alkali dissolution refining 2) into a crystallization reaction container, heating and raising the temperature to be 80-90 DEG C, regulating the pH value to be 3.0-3.5 by using diluted hydrochloric acid, reducing the temperature to be 55-60 DEG C, and centrifuging to obtain a finished folic acid product. |
| priorityDate | 2013-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.