Separation of phenol-cyclohexanone azeotrope by extractive distillation with adipic acid diester
US4016049A · kind A · utility
12Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1976 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Jul 28, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/83
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenol-cyclohexanone azeotrope, for example, resulting from the cleavage product of 1-phenylcyclohexylhydroperoxide resulting from the oxidation of cyclohexylbenzene, from which cyclohexylbenzene may have been separated, is subjected to an extractive distillation with a selective solvent essentially containing a diester of adipic acid, e.g. a dialkyl and/or a dicycloalkyl ester of adipic acid. Specifically disclosed is a separation of a cyclohexanone-phenol mixture employing di(2-ethylhexyladipate). The diesters up to and including diC.sub.14 are referenced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.