| abstract |
By oxidatively decomposing an ion exchange resin or waste ion exchange resin having a sulfonic acid group, a carboxyl group, a quaternary ammonium group or the like or a water absorbent resin having a carboxyl group with an oxidant in an adequate amount under adequate reaction conditions, the resin can be converted into a water-soluble ionic polymer. According to the present invention, a water-soluble ionic polymer can be obtained with high yield from waste ion exchange resins that have rarely been reused, and thus the above-mentioned resins are reusable as water-soluble ionic polymers. |