Patent ID: 8765825
Filing Date: 2014-07-01
Classification: B01J,C02F,C08F

Abstract:
1. A method for manufacturing a modified anion exchange resin, the method comprising contacting a water soluble polymer comprising an acid group with a starting anion exchange resin to produce a modified anion exchange resin, wherein: the anion exchange resin is a quaternary ammonium anion exchange resin; the water soluble polymer comprises a linear polymer material comprising the acid group; an amount of contact of the water soluble polymer is 0.01 to 10 mmol/L, in terms of an amount of the acid group, relative to 1 liter of the modified anion exchange resin; and a wafer surface flatness (Rms) of the anion exchange resin is 4 Å or less, determined by a silicon wafer test.