http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-WO2008143052-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2523-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-0576 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-199 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-252 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-055 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-235 |
| filingDate | 2008-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2010-08-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-WO2008143052-A1 |
| titleOfInvention | Method for producing methacrylic acid |
| abstract | An object of the present invention is to provide a method capable of using a catalyst for a long period of time in the production of methacrylic acid by vapor phase catalytic oxidation of methacrolein with molecular oxygen. In the present invention, in the presence of a catalyst comprising a composite oxide containing molybdenum and phosphorus, methacrolein, which is a raw material, is vapor-phase contact oxidized with molecular oxygen to produce methacrylic acid to 285 ° C. or higher and 305 ° C. or lower. The reaction pressure is controlled stepwise or continuously so that the reaction rate of the raw material becomes constant within the reaction temperature range, and the molecular oxygen in the reaction gas / independently or independently of the pressure control. The molar ratio control is performed to change the molar ratio of the raw materials stepwise or continuously. |
| priorityDate | 2007-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.