http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105601542-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-1863 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C273-189 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C273-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-16 |
| filingDate | 2016-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-105601542-B |
| titleOfInvention | A kind of method that nitration mixture crystallizes N carbamylglutamic acids |
| abstract | The invention discloses a kind of method that nitration mixture crystallizes N carbamylglutamic acids, two kinds are sequentially added into N carbamylglutamic acid reaction solutions or two or more acid is acidified；The solution of gained is stood overnight at 04 DEG C, crystallized；Suction filtration, gained solid is dried, and obtains N carbamylglutamic acid crude products.The acid is two or more in the inorganic acids such as concentrated hydrochloric acid, concentrated nitric acid, the concentrated sulfuric acid, concentrated phosphoric acid.The method for the nitration mixture crystallization N carbamylglutamic acids that the present invention is provided has advantages below compared with single sour acidization tool：Using the method for nitration mixture acidification reaction liquid can avoid it is single acid acidifying when caused common-ion effect, separated out so as to avoid sodium salt with product, be effectively improved product N carbamylglutamic acids crystallization purity.The product primary crystallization purity of the present invention is up to 98.3%. |
| priorityDate | 2016-01-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.