http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2008065776-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 |
| filingDate | 2007-07-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2010-03-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-WO2008065776-A1 |
| titleOfInvention | Industrial production of high-quality aromatic polycarbonate. |
| abstract | The problem to be solved by the present invention is that industrially large amounts (for example, 1 per hour) of high-quality and high-performance aromatic polycarbonates that are not colored and have excellent mechanical properties from cyclic carbonates and aromatic dihydroxy compounds. It is to provide a specific method capable of stably producing for a long period (for example, 1000 hours or more, preferably 3000 hours or more, more preferably 5000 hours or more) over a long period of time. In producing an aromatic polycarbonate from a cyclic carbonate and an aromatic dihydroxy compound, a step (I) of producing a dialkyl carbonate and a diol using a reactive distillation column having a specific structure, two reactive distillations having a specific structure Step (II) for producing a diaryl carbonate using a tower, Step (III) for purifying the diaryl carbonate to obtain a high-purity diaryl carbonate, and then a molten prepolymer obtained from the aromatic dihydroxy compound and the high-purity diaryl carbonate Including a step (IV) of producing an aromatic polycarbonate by using a guide contact flow type polymerization apparatus having a specific structure, and a step (V) of recycling the by-produced aromatic monohydroxy compound to the step (II). By implementing the method of the invention, the above problems can be achieved. |
| priorityDate | 2006-11-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 293.