http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1382313-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_794c0541eeb177127ba84aa959f0316a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-1608 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C68-01 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G64-0208 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C68-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-36 |
| filingDate | 1972-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1382313-A |
| titleOfInvention | Process for the carboxylation of glycols |
| abstract | 1382313 Preparation of carbonates and polycarbonates SNAM PROGETTI SpA 11 May 1972 [13 May 1971] 22237/72 Heading C2C Organic carbonates and polycarbonates are obtained by carboxylating glycols of formula wherein A is a divalent, optionally substituted, aliphatic, cycloaliphatic or aromatic hydrocarbon radical; n is 0 or an integer equal to or greater than 1; and each of R<SP>1</SP> to R<SP>4</SP>, which are the same or different, is an optionally substituted alkyl or aryl radical or a hydrogen atom, with CO and O 2 in the presence of a catalyst comprising ions of a single metal selected from Cu, Ag, Au, Zn, Cd, Hg, Fe, Co, Ni, Ru, Rh, Pd, Os, It and Pt, the metal initially being present in an oxidation state other than its highest oxidation state. The reaction is generally carried out at 0‹- 150‹ C. and at atmospheric pressure, or with the partial pressure of the CO ranging from 1 to 4 atmospheres. Polymeric carbonates are generally obtained when n is an integer and a temperature in excess of 70‹ C. and a pressure of at least 4 atmospheres absolute are used. The presence of a diluent inert to the reaction (e.g. aliphatic or aromatic hydrocarbons, ethers. or esters) is optional. The examples describe the preparation of unsubstituted and methylsubstituted ethylene and propylene carbonates from the corresponding 1,2- and 1,3-glycols and the preparation of linear polycarbonates comprising between 4 and 7 (average values) repeating units. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8304509-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5359094-A |
| priorityDate | 1971-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.