http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102702040-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6ea45c50a39988bf33456940418ef964 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-17 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-44 |
| filingDate | 2012-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6b43abfd0d99a5063e367bd0393d1450 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d20bc15304a634a0d36710473a891192 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_05deb7455bd1bc5028e9f46bb4d0d216 |
| publicationDate | 2014-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102702040-B |
| titleOfInvention | Method for preparing high-purity docusate sodium |
| abstract | The invention relates to a method for preparing docusate sodium. The method comprises the step of esterification between 2-ethyl hexanol and maleic anhydride and the step of sulfonation of the obtained ester and sodium hydrogensulfite in a water solution. The method is characterized in that the method further comprises the following steps of purification of rough products: crystallizing the sulfonated rough products in an alcohol and water system to obtain a water-containing crystal, dissolving the water-containing crystal in alcohol dehydratum, performing reduced pressure distillation to remove a solvent so as to obtain anhydrous docusate sodium, wherein alcohol in the alcohol and water system is selected from a group comprising methyl alcohol, ethanol, normal propyl alcohol and isopropyl alcohol, and the alcohol dehydratum is selected from ethanol, normal propyl alcohol and isopropyl alcohol. By the method provided by the invention, the high-purity docusate sodium can be prepared. |
| priorityDate | 2012-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.