http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1081174-A4
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d9cb217f83556ce2a418344c2d485415 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-00 |
| 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_1c5cc26737f311caf5998fe2f24e9f67 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dc9065fafec3a2df5d0b448e30beb9b4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_05addaf15e057ec1a3fcaf409b575999 |
| publicationDate | 2002-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1081174-A4 |
| titleOfInvention | PROCESS FOR PRODUCING POLYCARBONATE |
| abstract | A process for preparing polycarbonate is composed of the steps of transesterifying a dialkyl oxalate and a phenolic compound to give a diaryl oxalate; decarbonylating the diaryl oxalate to give a diaryl carbonate; reacting the diaryl carbonate with a polyvalent hydroxyl compound in the presence of a catalyst containing an amine compound or an ammonium compound to give the polycarbonate, removing a phenolic by-product/amine by-product mixture; collecting the mixture; purifying the mixture so that the amount of the amine by-product in the mixture is reduced to give a phenolic by-product mixture not containing the amine by-product in an amount of more than 600 ppm; and, utilizing thus purified phenolic mixture as a whole or a part of the phenolic compound in the first step. <IMAGE> |
| 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: 20.