http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105622390-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_67749b352cf78b8d1a7f7c346e880393 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C53-128 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-41 |
| filingDate | 2014-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e02d1a753d3f411ff86195d31c539150 |
| publicationDate | 2016-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105622390-A |
| titleOfInvention | Synthesis process for sodium valproate |
| abstract | The invention discloses a synthesis process for sodium valproate. The synthesis process comprises the following steps: mutually dissolving diethyl malonate and 1-bromopropane, slowly adding the obtained mixture into an ethanol solution of sodium ethoxide at a certain temperature, carrying out heating and reflux for 2 h, recovering ethanol until temperature is 110 DEG C, carrying out cooling to less than 80 DEG C, adding a certain amount of water to dissolve sodium bromide, carrying out layering to obtain a plurality of layers, then adding an aqueous sodium hydroxide solution with a concentration of 15 to 30%, carrying out hydrolysis at 60 to 70 DEG C for 3 h, then carrying out heating to recover ethanol until a gas phase temperature is 99 DEG C, carrying out cooling to less than 80 DEG C, adding hydrochloric acid for neutralization and acidifying, adding crude valproic acid to dissolve dipropylmalonic acid so as to obtain mixed acid and subjecting the mixed acid to slow heating and decarboxylation at 110 to 160 DEG C for production of crude valproic acid; and subjecting the crude valproic acid to rectification and refining, adding a certain amount of the aqueous sodium hydroxide solution for neutralization, adding toluene for reflux to bring out water, thereby allowing sodium valproate to dehydrate and crystallize and then successively carrying out filtering, washing with chloroform and drying so as to obtain finished sodium valproate. The process is safe and environment-friendly, produces good-quality sodium valproate, has low cost and is suitable for industrial production. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112142588-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112142588-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110563572-A |
| priorityDate | 2014-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.