Process for dehydrating a mixture of methanol and higher alcohols
US4874474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for the dehydration of a mixture of methanol and higher alcohols, containing 20 to 80% by weight of methanol, 1 to 60% by weight of at least a higher alcohol selected from those containing from 2 to 10 carbon atoms, 1 to 50% by weight of water and 0.1 to 10% by weight of hydrocarbons and/or of oxygen-containing organic compounds different from alcohols, which process comprises the following steps: p0 (a) feeding to a first rectification tower the mixture of methanol and higher alcohols to be dehydrated, a gaseous stream being discharged from the tower head, which contains a portion of the hydrocarbons and/or of the oxygen-containing organic compounds different from the alcohols; from a side point at a level higher than 2/3 of the tower height, a stream containing methanol and possibly ethanol being drawn; and from the tower bottom a stream being obtained with a methanol, and possibly ethanol, and having a content not larger than 10% by weight; PA0 (b) separating at least once the stream obtained from the bottom of the first column into two phases, one of which being aqueous, and the other phase being organic; PA0 (c) feeding the organic phase to a second towe…
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