Separation of the propyl alcohols from water by azeotropic or extractive distillation
US5085739A · kind A · utility
19Cited by
11References
4Claims
0Family size
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Key dates
| Filing date | Jan 30, 1991 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Jan 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12C11/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Isopropanol and n-propanol cannot be completely separated from water by conventional distillation or rectification because of the minimum boiling azeotrope. Isopropanol and n-propanol can be readily separated from water by using azeotropic or extractive distillation. Typical examples of effective agents are: for isopropanol by azeotropic distillation, vinyl n-butyl ether; by extractive distillation, polyethylene glycol; for n-propanol by azeotropic distillation, amyl formate; by extractive distillation, n-butyl acetate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.