Removal of halide impurities from organic liquids
US5300685A · kind A · utility
25Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/573
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is provided for removing iodide compounds, particularly alkyl iodide compounds, from iodine-containing liquids, particularly carboxylic acids and anhydrides manufactured by the carbonylation of alcohols, ethers, esters, and the like in the presence of a rhodium catalyst and an alkali metal or alkaline earth metal salt, particularly a lithium salt, wherein the carboxylic acid or anhydride is contacted with a silver or mercury salt coordinated to a polymeric resin containing functional groups having the capability to quaternize with or form ionic salts with the alkyl halides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.