Ethanol separation process having stripping section for reducing acetals
US8846987B2 · kind B2 · utility
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34References
21Claims
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Key dates
| Filing date | Aug 3, 2011 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 15, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/12
- 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 has a stripping section that comprises at least 40 stages to favor 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.