http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111606857-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5655ece22ef51386953e2eb581710ba7 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D233-72 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-72 |
| filingDate | 2020-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_103aa42fc5c69e3b1fb20b028c3f0a34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b355c6a573e1076092105e72f125eaa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2a6350bf785ef461f9822f04de5e8b2d |
| publicationDate | 2020-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111606857-A |
| titleOfInvention | A clean production process for continuous synthesis of hydantoin |
| abstract | A clean production process for continuous synthesis of hydantoin. A carbon dioxide ammonia solution prepared from an ammonia source, a carbon source and water is preheated and mixed with hydroxyacetonitrile, continuously synthesized, depressurized and flashed, stripped, concentrated, acidified, and crystallized. , Separate the crude hydantoin, and then refine it to obtain high-purity hydantoin products. The carbon dioxide and ammonia recovery system sequentially absorbs the carbon dioxide and ammonia water solution obtained from the gas phase separated by stripping and depressurization flash evaporation, and is applied back to the reaction system. The invention suppresses the generation of side reactions such as iminodiacetonitrile, nitrotriacetonitrile and glycine by increasing the amount of carbon dioxide in the ratio, and improves the hydantoin yield; The difficulty of recycling and applying medium carbon dioxide and ammonia reduces the loss of carbon dioxide and ammonia, and can realize zero discharge of waste water and waste liquid. It is an environmentally friendly and clean production method of hydantoin. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112552197-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112552197-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112979556-A |
| priorityDate | 2020-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.