Reducing acetals during ethanol separation process using high pressure distillation column
US8558034B2 · kind B2 · utility
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33References
20Claims
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Key dates
| Filing date | Aug 3, 2011 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Jan 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/88
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.