Separation of vinyl acetate from ethyl acetate by extractive distillation with acids or acid amides
US4925533A · kind A · utility
8Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Vinyl acetate cannot be easily removed from ethyl acetate by distillation because of the closeness of their boiling points. Vinyl acetate can be readily separated from ethyl acetate by means of extractive distillation. Typical effective agents are formic acid, formamide and formic acid-formamide mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.