Patent ID: 7674835

Claim:
A method of preparing a macroporous anion exchange resin, the method comprising: forming an aqueous phase composition comprising a) a monomer mixture comprising i) a crosslinking monomer comprising N,N′-alkylenebis(meth)acrylamide, N,N′-heteroalkylenebis(meth)acrylamide, or a combination thereof in an amount in a range of 15 to 90 weight percent based on a weight of monomers in the monomer mixture; and ii) a positively charged ionic monomer, wherein substantially all the monomers in the monomer mixture have a lipophilicity index less than or equal to 20; and b) a water-soluble porogen of Formula I R 1 —(R 2 —O) n —R 3 (I) wherein R 1 is hydroxy, alkoxy, carboxy, acyloxy, or halo; each R 2 is independently an alkylene having 1 to 4 carbon atoms; R 3 is hydrogen, alkyl, carboxyalkyl, acyl, or haloalkyl; n is an integer of 1 to 1,000; and c) an aqueous phase solvent mixture comprising water and a mono-alcohol having 1 to 4 carbon atoms, wherein the mono-alcohol is present in an amount of at least 20 weight percent based on a total weight of the aqueous phase solvent mixture; suspending the aqueous phase composition in a non-polar organic solvent; polymerizing the monomer mixture to form particles of polymeric material; and removing the porogen from the particles to form a macroporous anion exchange resin.