METHOD FOR PRODUCING ANION EXCHANGE RESIN ANION EXCHANGE RESIN METHOD FOR PRODUCING CATION EXCHANGE RESIN CATION EXCHANGE RESIN MIXED BED RESIN AND METHOD FOR PRODUCING ULTRA-PURE WATER FOR CLEANING ELECTRONIC DEVICE/MATERIAL

摘要

to (1-a) ~ (1-e) of the process involves, impurities or residual the generation of degradation products is suppressed, the eluate of the small anion exchange resin method. (1-a) a monovinyl aromatic monomer with a crosslinkable aromatic by copolymerizing a monomer obtain a cross-linked copolymer (1-b), the content of particular eluting compounds, crosslinked copolymer 1 g of a 400 [mu] g or less with respect to the process ( 1-c) by alkylation halo cross-linked copolymers, for introducing a haloalkyl group of up to 80 mol% of the monovinyl aromatic monomers step (1-d) from the halo alkylation crosslinked copolymer, the process of removing a particular eluting compounds ( 1-E) of the cross-linked copolymer halo alkylation reaction with an amine compound process