http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2008109759-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-00 |
| filingDate | 2006-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2009-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2008109759-A |
| titleOfInvention | METHOD FOR PRODUCING TRIFLUOROMETHANESULPHIC ACID ANHYDRIDE |
| abstract | 1. A method of producing trifluoromethanesulfonic anhydride, including:! reaction of trifluoromethanesulfonic acid with phosphorus pentoxide to obtain trifluoromethanesulfonic anhydride,! where solidification of the reaction solution occurs due to polyphosphoric acid which is produced as a by-product, and this is prevented by using an excess of trifluoromethanesulfonic acid with respect to phosphorus pentoxide. ! 2. The method for producing trifluoromethanesulfonic anhydride according to claim 1, wherein the amount of phosphorus pentoxide relative to trifluoromethanesulfonic acid in terms of a molar ratio of 0.3 or less. ! 3. The method for producing trifluoromethanesulfonic anhydride according to claim 1, wherein the amount of phosphorus pentoxide relative to trifluoromethanesulfonic acid in terms of a molar ratio is from 0.05 to 0.2. ! 4. A method for producing trifluoromethanesulfonic anhydride according to claim 1, wherein the method further comprises:! distilling off and recovering the obtained trifluoromethanesulfonic anhydride, and then continuing the stripping in order to distill off and recover the unreacted trifluoromethanesulfonic acid. ! 5. A method for producing trifluoromethanesulfonic anhydride according to claim 1, wherein the method further comprises:! distilling off and recovering the obtained trifluoromethanesulfonic anhydride under reduced pressure. |
| priorityDate | 2005-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 17.