Phenol purification
US4504364A · kind A · utility
7Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Jun 28, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the production of high purity phenol, a water-phenol mixture recovered from the top of a distillation column is contacted with a water immiscible solvent to extract methyl benzofuran and other by-products and impurities in phenol production therefrom, with the extraction being accomplished at a temperature at which the water-phenol mixture is present as a single phase liquid. The remaining mixture of phenol and water is recycled to the distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.