Extractive distillation of crude alcohol product
US8748675B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Jun 16, 2011 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/149
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using an extractive distillation column. The column yields a residue that comprises ethanol, acetic acid, and the extractive agent. The extractive agent may be water and may be separated from the residue and returned to the extractive distillation column.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.