http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101817758-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6f14ddb909651bd257a6b2e393365a12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C229-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C227-18 |
| filingDate | 2010-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9dfa0a2e93a240f79ab83e84ea974a75 |
| publicationDate | 2013-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-101817758-B |
| titleOfInvention | Preparation method of L-valine nitrate |
| abstract | The invention discloses a preparation method of L-valine nitrate, comprising the following steps of: adding L-valine into purified water under the normal temperature, evenly stirring and then adding nitric acid, wherein the mol ratio of the L-valine to the nitric acid is 1:1-1.1, and the weight ratio of the L-valine to the water of 1:0.4; gradually clarifying the solution at the reaction temperature of 40 to 70 DEG C and regulating the pH value of the solution to be 1 to 2 by using the nitric acid; cooling the clarified solution to 10 to 25 DEG C; carrying out solid-liquid separation on precipitated crystals; flushing the crystals and then drying at 60 to 85 DEG C to obtain an L-valine nitrate finished product; taking liquid subjected to the solid-liquid separation as a mother solution, and continuously recycling. In the preparation method of the L-valine nitrate, the food-grade L-valine and chemical reagent-grade-nitric acid are adopted to react, therefore, the reaction conditions are mild, the process is reasonable, simple and convenient, and the product has good quality and high purity up to more than 99 percent; in addition, the crystallized mother solution can be continuously recycled in the production, therefore, the invention has the yield coefficient up to more than 98 percent and is suitable for industrial large production. |
| priorityDate | 2010-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.