http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2458040-C2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4f6ee64e420ffdad3e2fb360c93302a0 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-582 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-738 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-313 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-185 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-573 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-083 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-573 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56 |
| filingDate | 2007-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2012-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e0e32f950af6c52aadf42beca9e17c5d |
| publicationDate | 2012-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2458040-C2 |
| titleOfInvention | Improved method of producing unsaturated carboxylic acid anhydrides |
| abstract | FIELD: chemistry. n SUBSTANCE: invention relates to an improved method of producing unsaturated carboxylic anhydrides of general formula I, in which R is an unsaturated organic residue having 2-12 carbon atoms by re-anhydridising an aliphatic carboxylic anhydride through reaction with a carboxylic acid of general formula II, in which R is as defined above, in an apparatus consisting of a reaction region and a rectification column, wherein a) the reactants are fed into the reaction region in stoichiometric ratios, b) the carboxylic acid formed as a by-product is removed from the reaction mixture, c) the carboxylic anhydride of the formula I is subsequently distilled off, d) the unconverted reactants are recycled into the reaction region, e) the reaction region contains a heterogeneous catalyst and f) one or more polymerisation inhibitors are added. n EFFECT: improvement lies in that stoichiometric excess of one of the reactants is avoided, formation of secondary components is prevented and complete conversion of reactants is achieved. n 6 cl, 1 dwg, 2 ex |
| priorityDate | 2006-12-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.