Separation of ethanol from isopropanol by azeotropic distillation
US5437770A · kind A · utility
86Cited by
7References
1Claims
0Family size
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Key dates
| Filing date | Sep 13, 1994 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Sep 13, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/82
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ethanol is difficult to separate from isopropanol by conventional distillation or rectification because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol by azeotropic distillation. Effective agents are sec. butyl acetate, hexene-1 and 1,3-dioxolane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.