http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20090092283-A
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/C07C51-083 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56 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 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-185 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-738 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-313 |
| filingDate | 2007-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d7a5998097667b913ad96c8b99bd7c6c |
| publicationDate | 2009-08-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20090092283-A |
| titleOfInvention | Improved method for the production of unsaturated carboxylic acid anhydrides |
| abstract | The present invention provides g) reactants to the reaction zone in stoichiometric ratio, h) carboxylic acids formed as by-products are removed from the reaction mixture, i) then carboxylic anhydrides of the formula (I) The converted reactant is recycled to the reaction zone, k) the reaction zone comprises a heterogeneous catalyst, l) adding at least one polymerization inhibitor, and in the equipment consisting of the reaction zone and the rectification column, aliphatic carboxylic acid An improved method of preparing an unsaturated carboxylic anhydride of formula (I) by transanhydrating anhydride with a carboxylic acid of formula (II)n n n <Formula I>n n n R-C (O) -O-C (O) -Rn n n In said formula, R is a C2-C12 unsaturated organic group.n n n <Formula II>n n n R-COOHn n n Wherein R is as defined above. |
| 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: 66.