http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-975949-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f564e8ae29bf6aa0572ce3eec2e20ba2 |
| 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 | 1960-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1964-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-975949-A |
| titleOfInvention | Recovery of cyclohexanone |
| abstract | Substantially pure cyclohexanone is recovered from a mixture consisting predominantly of cyclohexanone and cyclohexanol and substantially free of higher boiling constituents and cyclohexane by separating from the product mixture by fractional distillation under subatmospheric pressure a fraction enriched in cyclohexanone and subsequently separating from the said fraction substantially pure cyclohexanone in a second fractional distillation at a higher pressure, which is not higher than atmospheric pressure. Prior to the first fractionation above, higher boiling constituents are removed by fractional distillation under sub-atmospheric pressure of the starting material. The first two fractionations are preferably at substantially the same pressure and the final distillation of cyclohexanone at a pressure higher than that of both preceding distillations. In an example, an oil feed obtained from the oxidation of cyclohexane and augmented by the products of dehydrogenation of a cyclohexanol fraction is distilled at 16 mm.Hg. to separate a cyclohexanone-cyclohexanol mixture from heavy ends, the product is scrubbed with sodium hydroxide solution, the oil phase is fractionated at 16 mm.Hg. and the overhead fraction is fractionated at 60 mm.Hg. to produce cyclohexanone of 99.4% purity. The dehydrogenation of the cyclohexanol fraction and recycling is described in Specification 975,948. Specifications 909,227 and 966,546 also are referred to. |
| priorityDate | 1959-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.