http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I224095-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c72d118f5664072de841f9c5c34b9d99 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-96 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C68-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C68-02 |
| filingDate | 2002-07-12^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-11-21^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_43360e6767457222e3712ca0c751cf2a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ec4766cd841718ad4c344d873acb754 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_af725a7715213002ec061e2ea06545b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efab709a1ec9831f5cf7829dcd8ec4d8 |
| publicationDate | 2004-11-21^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-I224095-B |
| titleOfInvention | Solventless preparation of ester-substituted diaryl carbonates |
| abstract | High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of ester-substituted phenols with phosgene in the presence of a phase transfer catalyst (PTC) and optionally a tertiary amine catalyst in a solvent free reaction system comprising an aqueous phase held at a pH of 8.3 or higher. The optimized conditions of the present invention use an excess of ester-substituted phenol relative to phosgene and high conversion of phosgene to ester-substituted diaryl carbonate is observed. The product ester-substituted diaryl carbonate may be conveniently isolated as a solid by filtration or as a liquid in which the excess ester-substituted phenols serves as solvent. The method represents an attractive route for the manufacture of bis methyl salicyl carbonate and ester-substituted diaryl carbonates generally. |
| priorityDate | 2001-07-24^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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