Patent ID: 6071397
Filing Date: 2000-06-06
Classification: B01D,B01J,C02F

Abstract:
An apparatus for producing deionized water, comprising an electrodialyzer having cationic exchange membranes alternately arranged between a cathode and an anode to form demineralizing compartments and concentrating compartments, and wherein ion exchange resin particles are packed in the demineralizing compartments, wherein the ion exchange resin particles are a mixture of at least two groups of ion exchange resin particles with a first group having a particle size distribution of particles having particle sizes from 75 to 125% of the average particle size, and being at least 85 wt % of the total amount; and a second group having a maximum average particle size, which is at least 1.5 times the average particle size of the group of ion exchange resin particles having the minimum average particle size.