Preparation of acetic acid
US7485749B2 · kind B2 · utility
3Cited by
16References
24Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 22, 2006 |
| Grant date | Feb 3, 2009 |
| Priority date | — |
| Expiry date | Mar 29, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for removing aldehyde impurities from an acetic acid stream is disclosed. The method comprises reacting aldehyde impurities with a hydroxyl compound in a drying distillation column or a combined column to form corresponding acetals. The acetals are subsequently removed as heavy impurities from acetic acid by distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.