http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111018823-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D313-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-252 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D313-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C57-045 |
| filingDate | 2019-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111018823-B |
| titleOfInvention | Process for preparing epsilon-caprolactone and co-producing methacrylic acid by cyclohexanone |
| abstract | The invention provides a process for preparing epsilon-caprolactone and co-producing methacrylic acid by oxidizing cyclohexanone, which comprises the steps of adding a catalyst, cyclohexanone and an organic solvent into a reaction kettle with the oxygen pressure of 0.1-1MPa, raising the temperature to 30-90 ℃ under stirring, slowly adding methacrolein, and continuously stirring for 1-12h to obtain a mixed solution of the epsilon-caprolactone, the cyclohexanone, the methacrylic acid, the methacrolein and the organic solvent. And (3) after the mixed solution is subjected to secondary rectification by a rectifying tower, respectively obtaining epsilon-caprolactone and methacrylic acid. The invention catalyzes molecular oxygen to oxidize methacrolein and cyclohexanone again to generate methacrylic acid and epsilon-caprolactone at low temperature, successfully couples the two reactions, solves the problems of low value and difficult separation of byproducts in the process of preparing epsilon-caprolactone by directly oxidizing cyclohexanone by molecular oxygen, and leads the molecular oxygen to produce epsilon-caprolactone and co-produce methacrylic acid. |
| priorityDate | 2019-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.