Large ion exchange beads and a method for preparing same

Details Large ion exchange beads and a method for preparing same Large ion exchange beads and a method for preparing same

C - Chemistry, Metallurgy

08

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C08F 257/00 (2006.01) B01J 39/20 (2006.01) B01J 41/14 (2006.01) C08F 8/00 (2006.01) C08F 8/24 (2006.01) C08F 257/02 (2006.01)

Patent

CA 1144700

ABSTRACT Ion-exchange resins in the form of large, spheroidal beads having improved integrity and increased resistance to osmotic shock are prepared from a seed bead of a cross-linked addition copolymer having a monomer mix- ture of a mono- and polyethylenically unsaturated monomer imbibed and subsequently polymerized therein. For exam- ple, the spheroidal beads prepared by the imbibition and subsequent copolymerization of styrene and divinylbenzene within a seed bead of a copolymer of the same monomeric components can be aminated to form anion-exchange beads having a particle diameter of at least 1.0 mm which exhib- it reduced breakage and/or increased osmotic shock resis- tance. 27,931A-F

374647

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