Specific Ion Exchange Properties of a New Porous Ion Exchange Resin Having an Open-celled Monolith Structure

A new porous ion exchange resin having an open-celled monolith structure was prepared and its ion exchange properties were examined. The new ion exchange resin was found to have the following advantages over the conventional ion exchange resins having bead structures. First, the new ion exchange resin has a high adsorption ability for the ions having low selectivity coefficients, and the ion exchange band length is smaller than that of the conventional resins. Second, in an electric field, the rejection time of the ions adsorbed to the new ion exchange resin was about one twentieth of that of the ions containing the conventional resins. These specific properties of the new ion exchange resin are attributable to the quantitative introduction of ion exchange groups into the resin having a uniform open-celled monolith structure.