High-pressure azeotropic distillation for the manufacture of anhydrous alcohols
US4161429A · kind A · utility
17Cited by
14References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 22, 1976 |
| Grant date | Jul 17, 1979 |
| Priority date | — |
| Expiry date | Oct 22, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C29/82
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A unique combination of specially chosen entrainers, e.g., pentanes and cyclohexane, and high-pressure azeotropic distillation conditions, e.g., 100-200 psig., provides an economically efficient separation of a C.sub.2 -C.sub.5 alkyl alcohol, e.g., isopropanol, from its aqueous mixture; and also results in the production of a useable steam having a sufficient pressure, e.g., from 10 psig. to 30 psig. Preferably, said azeotropic distillation is conducted in the substantial absence of oxygen, e.g., less than 1 wppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.