Ethanol extraction process
US4508928A · kind A · utility
8Cited by
16References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1982 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | May 3, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the separation of ethanol from water using solvent extraction at elevated pressures is disclosed. Separation is effected by contacting aqueous ethanol with either propylene (propene), allene (propadiene), methyl acetylene (propyne), or methyl allene (1,2-butadiene). This produces two liquid phases which separate because of the difference in their densities, and are easily drawn off as separate streams. The solvent is recovered by distillation and condensation using a heat pump to transfer heat. The ethanol and water remain in a liquid state and are substantially recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.