Processes for maximizing ethanol formation in the hydrogenation of acetic acid
US9328044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Jan 31, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/80
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In one embodiment, the invention is to a process for purifying a crude ethanol product. The process comprises the step of hydrogenating acetic acid in a reactor in the presence of a catalyst to form the crude ethanol product. The process further comprises the step of separating at least a portion of the crude ethanol product in a purification zone. The purification zone preferably comprises a first column, which yields a first distillate comprising ethanol, water and ethyl acetate, and a first residue comprising acetic acid. The at least a portion of the crude ethanol product has a residence time from the reactor to the purification zone from 5 minutes to 5 days.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.