Method and apparatus for making acetic acid with improved purification
US7619113B2 · kind B2 · utility
6Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2007 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Sep 27, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method of producing acetic acid includes condensing overhead vapor from a light ends column and decanting the condensed vapor to a light phase and a heavy phase. The heavy phase consists predominantly of methyl iodide and at least a portion of the decanted heavy phase is refluxed to the light ends column. Acetic acid content of the light ends column overhead stream and water content of the light ends column product (sidedraw) stream are both decreased, improving purification efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.