http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109705337-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G69-26 |
| filingDate | 2019-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109705337-B |
| titleOfInvention | Continuous synthesis method of polyamide and vertical multi-stage reactor |
| abstract | The invention provides a continuous synthesis method of polyamide, which synthesizes polyamide by means of gas-liquid parallel flow and gas-phase pressure gradual decrease, avoids the escape of a large amount of diamine and water at the early stage of reaction, and ensures the complete reaction of polyamide salt; in the later stage of the reaction, the gas phase pressure is low, which is beneficial to removing water in the reaction system and promoting the increase of the molecular weight of the polyamide, the polymerization degree of the product reaches 20-60, and the requirement of a subsequent pressure reducing device is reduced or eliminated. The invention further provides a reactor for implementing the method, which is beneficial to increasing the reliability of the reaction process, reducing the energy requirement, reducing the investment and maintenance expenditure of equipment and the like. |
| priorityDate | 2019-01-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.