Production of high purity phenol
US4634796A · kind A · utility
12Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Mar 25, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Phenol feed to a steam distilling column, containing alpha-methylstyrene and mesityl oxide, is treated with a base, without acidification, and the heavy phenol product is acidified and distilled in a high purity column to recover high purity phenol as a sidestream and lighter components as overhead. Acidification after steam distilling, rather than prior to steam distilling, increases phenol recovery by reducing the overhead pasteurizing cut from the high purity column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.