Method for solvent recovery in solvent separation of ethanol from water
US4520213A · kind A · utility
92Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1983 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Jul 14, 2003 |
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 layers which separate because of the difference in their densities, and are easily drawn off as separate streams. The solvent is recovered by reverse osmosis means in a liquid state. The ethanol and water remain in a liquid state and are substantially recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.