Patent ID: 7485213
Filing Date: 2009-02-03
Classification: B01D,B01J,C02F,Y02A

Abstract:
1. An electrodeionization apparatus, comprising: a plurality of anion exchange membranes and a plurality of cation exchange membranes that are alternately arranged between a cathode and an anode, the anion exchange membranes and the cation exchange membranes configuring a plurality of concentrating compartments and a plurality of desalting compartments alternately arranged, wherein the concentrating compartments are filled with first ion exchangers, the first ion exchangers being composed of a mixture mixed by anion exchangers and cation ion exchangers with a first ratio of anion exchangers to cation ion exchangers; the desalting compartments are filled with second ion exchangers, the second ion exchangers being composed of a mixture mixed by anion exchangers and cation ion exchangers with a second ratio of anion exchangers to cation ion exchangers, wherein the first ratio is higher than the second ratio.