Process for producing high purity acetic acid
US5625095A · kind A · utility
75Cited by
6References
2Claims
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Key dates
| Filing date | Jun 2, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Jun 2, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A high purity acetic acid is prepared by reacting methanol with carbon monoxide in the presence of a rhodium catalyst, iodide salts, and methyl iodide, wherein an acetaldehyde concentration in the reaction liquid is maintained at 400 ppm or lower. This may be attained by contacting the liquid containing carbonyl impurities with water to separate and remove the carbonyl impurities. After that, the liquid can be returned to the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.