http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-979761-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5672b080a49832855a8d296eddea8f93 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D401-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-803 |
| filingDate | 1961-02-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-979761-A |
| titleOfInvention | Improvements in or relating to the production of nicotinic or isonicotinic acids |
| abstract | Nicotinic and isonicotinic acids are prepared from organic bases containing the pyridine ring by oxidizing the bases in the presence of a catalyst and in a medium into which sulphur trioxide is introduced. The organic bases contain readily oxidizable groups comprising straight or branched chain, or cyclic hydrocarbons or a heterocyclic group wherein the bond adjacent the pyridine ring is a carbon to carbon bond e.g. methyl or ethyl pyridines, quinoline, isoquinoline and the methyl derivatives of quinoline and isoquinoline. The sulphur trioxide combines with the water produced and the sulphuric acid concentration is maintained and the reaction is exothermic. The gaseous mixture from the contact chamber of a sulphuric acid process may be used and the process may be continuous at a preferred temperature of 270 DEG -290 DEG C. with selenium as the oxidation catalyst. |
| priorityDate | 1960-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 32.