Method of purifying acetic acid
US5916422A · kind A · utility
40Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for purifying acetic acid containing at least one component selected from the group consisting of unsaturated compounds and carbonyl compounds as an impurity involves the step of purifying the acetic acid with a distillation column having at least 30 plates by operating the distillation column at a pressure ranging from 40 to 760 mmHg and a reflux ratio of at least 4, and yields a high-quality acetic acid which rates high in the potassium permanganate test without needing of the addition of any chemical to the acetic acid to be purified and a large amount of energy, and is economical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.