Reduced energy alcohol separation process having water removal
US9126125B2 · kind B2 · utility
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69References
22Claims
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Key dates
| Filing date | Apr 26, 2012 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | May 26, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/86
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to the recovery of alcohols, in particular ethanol, from a crude ethanol product obtained from the hydrogenation of acetic acid using a reduced energy process. The crude ethanol product may be fed to a distillation column in which a substantial portion of the water is removed with the acetic acid in the residue. Additional water may be removed by using a pressure swing adsorption unit, molecular sieve, and/or membrane. Ethanol extraction may also be used to reduce the ethanol concentration in the recycle streams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.