Abstract: A process for the preparation of an anion exchange resin is described, which comprises reacting an aromatic crosslinked haloalkyl-containing copolymer with an amine in the presence of at least 100 parts by weight, per 100 parts by weight of the copolymer, of water and at least 5 parts by weight, per 100 parts by weight of water, of a water-soluble inorganic salt. A process for the preparation of an anion exchange resin is also described, which comprises acting a haloalkylating agent on an aromatic crosslinked copolymer, separating an unreacted portion of the haloalkylating agent from the aromatic crosslinked haloalkyl-containing copolymer so obtained, and reacting the resulting haloalkyl-containing copolymer with an amine in the presence of at least 100 parts by weight, per 100 parts by weight of the copolymer, of water and at least 5 parts by weight, per 100 parts by weight of water, of a water-soluble inorganic salt.

Abstract: A process for producing a chloromethylated polymer by reacting styrene polymer particles with chloromethyl methyl ether in the presence of a catalyst, characterized in that hydrogen chloride is added to the reaction product mixture, followed by distillation to recover a distillate mixture containing chloromethyl methyl ether.

Abstract: A process for producing a cation exchange resin which comprises suspension polymerizing a monomeric mixture comprising (1) styrene, (2) 0.8 to 55 mole %, per mole of styrene, of divinylbenzene and (3) 2 to 20 mole %, per mole of styrene, of acrylic or methacrylic acid and/or its lower alkyl ester, and sulfonating the resulting copolymer particles.