Separation of methanol and propylene oxide from a reaction mixture
US5849938A · kind A · utility
27Cited by
13References
18Claims
0Family size
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Key dates
| Filing date | Sep 2, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Sep 2, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Propylene is separated from the methanol present as a solvent in a crude olefin epoxidation product by means of an extractive distillation wherein a relatively heavy polar solvent having hydroxy groups such as water or propylene glycol is used as the extractive solvent. The method is also useful for removing water and impurities such as acetaldehyde from the propylene oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.