http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111138318-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C231-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-20 |
| filingDate | 2020-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2023-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2023-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111138318-B |
| titleOfInvention | A kind of method utilizing methyl p-hydroxybenzoate and urea to prepare p-hydroxybenzonitrile |
| abstract | Based on methyl p-hydroxybenzoate and urea, artificial zeolite, silica gel, alumina, SiO 2 , ZrO 2 or molecular sieves are impregnated with phosphoric acid aqueous solution and then burned at high temperature. Aluminum, SiO 2 , ZrO 2 or molecular sieves as the carrier of immobilized phosphoric acid as a catalyst, at high temperature, the p-hydroxybenzamide generated by the reaction of methyl p-hydroxybenzoate with urea in an ammonia atmosphere is subjected to in-situ catalytic dehydration, by Methyl p-hydroxybenzoate and urea are directly prepared to obtain a mixed material containing p-hydroxybenzonitrile, and finally the mixed material containing p-hydroxybenzonitrile obtained by cooling and condensing or rectifying the condensation is carried out to obtain a relative to the p-hydroxybenzonitrile A yield of more than 70% of the quality of methyl benzoate obtains a p-hydroxybenzonitrile product with a mass percentage greater than 97%. |
| priorityDate | 2020-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 64.