Iodide removal process
AssigneeUnion Carbide Chemicals & Plastics Technology Corporation
InventorsBarry B. Fish, William D. Prince, Michael P. Spratt
Life of this patent
Estimating the term…
Abstract
This invention relates tot he use of ion exchange resins having metal-exchanged thiol functional groups in removing iodide impurities from carboxylic acids and/or carboxylic acid anhydrides. More particularly, this invention provides a process for removing iodide impurities from liquid carboxylic acids and/or carboxylic acid anhydrides using ion exchange resins in which thiol functional groups have been exchanged with silver, palladium or mercury.
Claims10
A process for removing iodide impurities from a liquid carboxylic acid having 2 to 6 carbon atoms inclusive and/or its corresponding carboxylic acid anhydride which process comprises contacting the liquid with an ion exchange resin which has thiol functional groups exchanged by silver, palladium and/or mercury and which may also have sulfonic functional groups exchanged by silver, palladium or mercury.
Dependencies are inferred from the claim text.