Recovering ethanol sidedraw by separating crude product from hydrogenation process
US8536384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2012 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Apr 26, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing ethanol is disclosed, comprising the steps of hydrogenating acetic acid in a reactor in the presence of a catalyst to form a crude ethanol product, separating at least a portion of the crude ethanol product in a column into a first distillate comprising ethanol and a first residue comprising acetic acid and water, wherein a substantial portion of the water in the crude ethanol product that is fed to the column is removed in the first residue, and separating a portion of the ethanol mixture stream to the second distillation column to yield an ethanol product sidedraw, second residue comprising water and a second distillate comprising ethyl acetate. The water content of the ethanol product sidedraw may be further reduced to yield a stream having reduced water content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.