http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102702049-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4f2c62ec89c694f685b37d4b8df0b620 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C323-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C319-20 |
| filingDate | 2012-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c86fd6c5ae37fba4b81783622b8362ba http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0e986d2e11d17e846db93502cc87349e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d528b31119cb18cb17cbdce063aefd54 |
| publicationDate | 2013-11-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102702049-B |
| titleOfInvention | Method for preparing solid 2-hydroxy-4-(methylthio) butanoic acid |
| abstract | The invention relates to a method for preparing a solid 2-hydroxy-4-(methylthio) butanoic acid, which comprises the following steps of: a. utizling a methionine hydroxy solution to prepare methionine hydroxy calcium or hydroxy methionine barium; b. mixing the methionine hydroxy calcium or hydroxy methionine barium obtained in a step a with concentrated sulfuric acid according to a stoichiometric ratio, adding a reaction medium B, reacting for 0.5-6h at a temperature of between room temperature and 50 DEG C, stirring and carrying out solid-liquid separation to obtain a methionine hydroxy solution; and c. distilling the methionine hydroxy solution obtained in a step b in a reduced pressure to remove an organic solvent, and after drying the resulting solid, obtaining the solid 2-hydroxy-4-(methylthio) butanoic acid. Compared with the traditional molecular distillation method, the method provided by the invention has the advantages of simple operation, no needs for a short range evaporator or thin film evaporator, and low cost. |
| priorityDate | 2012-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 77.