Process for separating ethylene oxide from aldehyde impurities by distillation
US4966657A · kind A · utility
12Cited by
7References
13Claims
0Family size
Inventors
Key dates
| Filing date | Dec 16, 1988 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Dec 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D301/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for separating ethylene-oxide from formaldehyde and acetaldehyde in contaminated ethylene oxide, the process involves introducing the contaminated ethylene oxide into a reflux column and distilling the contaminated ethylene oxide under conditions such that the fluid stream leaving the bottom of the reflux column contains the water present in the contaminated ethylene oxide and the ethylene oxide in amounts corresponding, on a weight basis, to 0.15 to 3 times the weight of the water, and the ethylene oxide resulting from the separation of the formaldehyde and acetaldehyde leaves the column at its top.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.