http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107446125-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2650-56 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-46 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-44 |
| filingDate | 2016-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107446125-B |
| titleOfInvention | Method for producing polyphenylene ether |
| abstract | The present invention relates to a method for producing polyphenylene ether, which can significantly reduce the generation of transition products during troubles such as the increase of fine powder, the adhesion of scale in a precipitation tank, and the like, and the change of the type, and can efficiently obtain PPE. The method for producing PPE of the present invention is characterized by comprising the steps of: a polymerization step of subjecting a phenolic compound to oxidative polymerization in a polymerization solution containing a good solvent for PPE and a catalyst to obtain a PPE mixed solution; and a precipitation step of adding the PPE mixed solution, a poor solvent for PPE, and water to a precipitation tank equipped with a stirrer, mixing them, and precipitating PPE to obtain a slurry containing PPE particles, wherein in the precipitation step, the poor solvent for PPE and the water are added to the precipitation tank through different pipes, and in the precipitation step, the amount of water added is 0.05 to 30 mass% relative to 100 mass% of the poor solvent for PPE. |
| priorityDate | 2016-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 248.