http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2010127739-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-307 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-00 |
| filingDate | 2010-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2012-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2010127739-A |
| titleOfInvention | METHOD FOR PRODUCING POLYCARBONATE |
| abstract | 1. A method of producing polycarbonate, comprising at least the following stages:! a) transesterification of one or more bisphenols with one or more diaryl carbonates to oligo- / polycarbonate and monophenol; ! b) isolation or separation of polycarbonate and monophenol; ! c) reacting monophenol with carbonyldihalide in the presence of caustic liquor and separating the products, the diaryl carbonate being reused in step a); ! d) electrochemical oxidation of the alkali metal halide obtained in stage c) to obtain halogen and caustic liquor; ! e) reacting at least a portion of the halogen from step d) with carbon monoxide to a carbonyl dihalide, which is at least partially used in step c); ! d) reuse of at least part of the caustic liquor from stage d) to stage c). ! 2. The method according to claim 1, characterized in that dioxydiarylalkanes of formula (I) are used as bisphenols in step a)! ,! in which Z denotes a divalent organic residue with 6-30 carbon atoms containing one or more aromatic groups. ! 3. The method according to claim 1, characterized in that di-C6-C14 aryl esters are used as diaryl carbonates in step a). ! 4. The method according to claim 1, characterized in that phenols of formula (II) are used as monophenols for producing diaryl carbonates in step c)! ,! wherein ! R is hydrogen, halogen or branched or linear C1-C9 alkyl and alkoxycarbonyl. ! 5. A method according to claim 1, characterized in that the diaryl carbonate used is diphenyl carbonate, the bisphenol is bisphenol A, the carbonyldihalide is phosgene, and e� |
| priorityDate | 2009-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.