Patent ID: 6624205
Filing Date: 2003-09-23
Classification: B01J

Abstract:
A cation exchanger comprised of a fine particle with an average particle diameter in the range of 1 &mgr;m to 1,000 &mgr;m having bound to the surface thereof a polymer having a cation exchanging property; said polymer having a cation exchanging property being at least one copolymer prepared by copolymerization of at least one kind of unsaturated carboxylic acid selected from the group consisting of acrylic acid, methacrylic acid, maleic acid and itaconic acid with at least one kind of monomer selected from the group consisting of vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate, 3-sulfo-2-hydroxypropyl acrylate and 3-sulfo-2-hydroxypropyl methacrylate and partially crosslinked with a polymer having at least one kind of functional group selected from the group consisting of a hydroxyl group, a glycidyl group and an amino group.