Process for removing iodide compounds from carboxylic acids and carboxylic acid anhydrides
USRE35615E · kind E · reissue
1Cited by
11References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 19, 1995 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Jun 19, 2015 |
Classification
- Technology area (CPC —)General
Abstract
In a process for removing iodide compounds from a liquid composition comprising carboxylic acids having 2 to 6 carbon atoms or anhydrides thereof, by passing the liquid composition through a silver, mercury, palladium and/or rhodium-exchanged strong acid cation exchange resin, prior to contacting with the metal-exchanged resin the composition is contacted with a cation exchanger in the acid form to remove at least a portion of the metal ion contaminants in the liquid composition which have been found to displace the silver, mercury, palladium and/or rhodium from the metal-exchanged resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.