Cyclohexanone distillation process
US4306944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1980 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Jul 3, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process of distilling a cyclohexanone-rich overhead stream in a first still from a feed mixture comprising cyclohexanone, phenol and cyclohexanol of the type wherein a cyclohexanone-rich stream is withdrawn as a part of an overheads condensate from the first still and a phenol-rich stream is withdrawn as a part of a reboiled bottom stream from the first still. The improvement includes withdrawing a side stream substantially free of phenol from above the point where the feed mixture is fed to the first column and separating the side stream in a second still into a second cyclohexanone-rich overhead stream and a bottom stream containing cyclohexanone and cyclohexanol. The second cyclohexanone-rich stream may be returned to the first still.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.