http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1018557-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-78 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-82 |
| filingDate | 1962-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_59b0ec4bd79cf83975ff52a475320aec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_38b1b917f3340ae0c967849ce747b8f8 |
| publicationDate | 1966-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1018557-A |
| titleOfInvention | Process for the purification of cyclohexanone and homologues thereof |
| abstract | Cyclohexanone, or a homologue containing 1 or 2 alkyl groups of up to 4 carbon atoms each, obtained by the dehydrogenation of the corresponding cyclohexanol, is freed from unsaturated ketonic impurities by dispersing in the crude cyclohexanone about 0.01-1% by weight of an alkali-metal or alkaline-earth metal compound of alkaline reaction, and distilling the cyclohexanone in the presence of the alkali or alkaline-earth metal compound. Specified compounds of alkaline reaction are alkali and alkaline-earth (other than magnesium) hydroxides, alcoholates of 1-4 carbon atoms, phenolates and naphtholates, and alkali-metal carbonates, a number of suitable compounds being specified. The alkali or alkaline-earth metal compound may be taken as such or formed in situ, e.g. from an oxide, hydride or carbide. Conventional dehydrogenation catalysts may be used for the conversion of the cyclohexanol into cyclohexanone, and a number of suitable catalysts are specified. The dehydrogenation may be carried out in a single stage or in a number of stages, and the cyclohexanol starting material may have been obtained by the hydrogenation of the corresponding phenol, or by the hydrogenation and hydrolysis of aniline, the toluidines, the xylidines or the corresponding nitro compounds, or by the atmospheric oxidation of cyclohexane. The distillation of the cyclohexanone product is preferably effected in at least two stages, the compound of alkaline reaction being added before the first stage or at a later stage. In the first stage low-boiling impurities may be removed at a pressure between 300 mm. and 5 atm., and cyclohexanone then distilled from the residue at a pressure of 1-200 mm. Examples are given of the treatment of (1) methylcyclohexanol, obtained by hydrogenation of cresol, and (2) cyclohexanol, obtained by passing a mixture of aniline, steam and hydrogen over a hydrogenation catalyst. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2878847-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7579506-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2006061487-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100924256-B1 |
| priorityDate | 1961-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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