Process for purifying benzene and toluene by extractive azeotropic distillation
US4168209A · kind A · utility
6Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1978 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Mar 8, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for separating benzene and/or toluene from mixtures thereof with saturated hydrocarbons, by extractive distillation using an aliphatic N-alkylamide as extraction solvent, comprising introducing in the distillation column, above the level of introduction of the extraction solvent, liquid water in an amount and under such conditions that said water is completely vaporized without substantially diluting the solvent, condensing the vapors discharged from the top of the column and dividing the resulting condensate into a phase of liquid saturated hydrocarbons, and a phase of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.