http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0052077-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f42ca51da45ef93068c979632019df88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3ffbba6a4a242bc47ada9e3729403ac7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2785e8337678ebd5181abc69dc086aa6 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C68-00 |
| filingDate | 2000-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c2355abd0314c9823511de8b38eb52b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2172475021c683aae4d973ad86cd56f3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_00eade4da961e9c3549a2dcd6cafa4d6 |
| publicationDate | 2000-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-0052077-A1 |
| titleOfInvention | Process for producing polycarbonate |
| abstract | A process in which a recovered phenol compound obtained in polycarbonate production with a specific polycondensation catalyst is subjected as a starting material to transesterification and decarbonylation to produce a diaryl carbonate while avoiding various problems caused by impurities, and the diaryl carbonate is subjected to polycondensation to thereby industrially advantageously produce a polycarbonate. The process comprises: a first step in which a diaryl oxalate is synthesized by the transesterification of a dialkyl oxalate with a phenol compound; a second step in which a diaryl carbonate is obtained by the decarbonylation of the diaryl oxalate; a third step in which a polycarbonate is produced by the polycondensation of the diaryl carbonate with a polyhydroxy compound; and a fourth step in which the phenol compound yielded as a by-product in the polycondensation system is separated therefrom and the recovered phenol compound is purified to obtain a purified phenol compound in which the content of the impurities derived from the polycondensation has been reduced. The resultant purified phenol compound is circulated for use in the transesterification as the first step. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002053657-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106117534-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106117534-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2016020315-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105315445-A |
| priorityDate | 1999-03-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.