PURPOSE: To obtain an ion exchanger wherein a very small amount of an ion exchange group is introduced to only the surface of a hydrophilic carrier, by reacting a substance which is directly reacted with a glycidyl group introduced to a hydrophilic porous spherical carrier to become an ion exchange group with the glycidyl group.
CONSTITUTION: For example, a monomer such as hydroxyalkyl, glycerin, etc. is polymerized in the presence of a crosslinking agent (e.g., divinylbenzene, ethylene glycol dimethacrylate, etc.) to give a hydrophilic porous spherical carrier, which is impregnated with paraffin, dispersed into an alkali solution and reacted with a glycidyl group-containing reagent (e.g. epichlorohydrin, alkylene diglycidyl ether, etc.) capable of reacting with a hydroxyl group in the present of a catalyst (e.g. α,α'-azobisisobutyronitrile, etc.) so that the glycidyl group is introduced into the carrier. The carrier is washed with a solvent, the paraffin in the carrier is washed way and then the glycidyl group is reacted with a substance (e.g. sodium nitrite, etc.) which is directly reacted with a glycidyl group and becomes an ion exchanger.
INOUE YOSHINORI
KUMAGAI HIROKI
