http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105541845-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D475-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D475-04 |
| filingDate | 2016-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2018-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2018-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105541845-B |
| titleOfInvention | Folic acid cleanly production technique |
| abstract | The invention discloses a kind of folic acid cleanly production technique, first by 2,4, the hydroxy pyrimidine sulfate of 5 triamido 6, NSC 71042 and trichloroacetone mixing, reacted in the presence of alkali sodium hydroxide liquid, reaction temperature is 50~60 DEG C, and pH is 2.0~3.5,8~10h of reaction time, obtains crude product；Sodium pyrosulfite is added into the crude product, 0.5h are stirred at 38~40 DEG C, the sodium carbonate liquor for being added dropwise 10% maintains pH to keep 2h, obtain reaction solution one 3~3.5；Reaction solution one is filtered, the step such as acid carries, alkali refining, sterling folic acid is prepared.The folic acid yield that the present invention is prepared is more than 75%, and purity is more than 95%. |
| priorityDate | 2016-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.