http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109776424-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_965d2667a722099b397c3e7668895bda |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-74 |
| filingDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0ad93fc6be25d5fecb0973063aea8f4b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_36fe4a281b633974d9719f9ba7f49b43 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ccb20aa793e633cb2c146ab99a3c4e45 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86595d2e5632dcba4a33857dac1b9f12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86716b981cdbed2038b851e5aa2b5bc2 |
| publicationDate | 2019-05-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109776424-A |
| titleOfInvention | A new method for preparing L-phenylglycine precursor trihydantoin in MIC reactor |
| abstract | The present invention relates to a new method for preparing L-phenylglycine precursor dihydantoin in a MIC reactor. The existing process adopts the batch production of the reaction kettle, and there is a lot of unorganized waste gas. During the material transfer process, there is a possibility of leakage of materials on the sealing surface, and the hidden safety and environmental risks are both high. In the present invention, ammonium bicarbonate (reduced pure), sodium cyanide (30% aqueous solution) and benzaldehyde are pumped into a MIC reactor preheated to 60° C. in a mass ratio of 8.2:15.8:10 to carry out a mixed reaction, and a liquid preparation solution is prepared. Hydrolyzed to obtain mixed phenylglycine, the discharge port of the MIC reactor is connected to a gas-liquid separation tank, the gas outlet of the gas-liquid separation tank is connected to a pressure gauge to display the system pressure, and the gas-liquid separation tank is also connected to a back pressure valve to carry out the entire system. back pressure. The invention adopts the ammonium bicarbonate aqueous solution to replace the solid ammonium bicarbonate, and successfully avoids the dust and unorganized waste gas generated when the solid ammonium bicarbonate is fed, and in addition, the consumption of ammonium bicarbonate is reduced from 1.5 equivalents to 1.1 equivalents, and the economic benefit is obvious. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114516811-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112250634-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111269134-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111269134-A |
| priorityDate | 2019-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.