Vinyl acetate purification process
US4379940A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1980 |
| Grant date | Apr 12, 1983 |
| Priority date | — |
| Expiry date | Oct 27, 2000 |
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 sodium chloride. The first stage consists of removing acetic acid by passing the vinyl acetate feed through a dehydrated anion exchange resin bed. The second stage consists of removing coloration agents by passing the vinyl acetate feed through a bed of activated carbon. The third stage consists of removing water by passing the vinyl acetate feed through a bed of desiccant. The fourth stage consists of removing sodium chloride 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.