Vinyl acetate purification process
US4487959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1983 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Apr 12, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for purifying vinyl acetate contaminated with acetic acid, coloration agents, water, and/or cations and anions. A first stage consists of removing acetic acid from a vinyl acetate feed by dehydrating a commercially-available anion exchange resin by means of azeotropic distillation and passing the feed through a bed of the dehydrated resin. A second stage can consist of removing coloration agents by passing the vinyl acetate feed through a bed of activated carbon. A third stage can consist of removing water by passing the vinyl acetate feed through a bed of desiccant. A fourth stage can consist of removing cations and anions by passing the vinyl acetate feed through separate cation exchange resin and anion exchange resin beds or through a mixed resin bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.