Patent ID: 7476307
Filing Date: 2009-01-13
Classification: C01B,C25B

Abstract:
1. A system for producing chlorine dioxide, comprising: an electrochemical acidification cell comprising an anode compartment comprising an anode, a cathode compartment comprising a cathode, and a central compartment positioned between the anode and cathode compartments, wherein the central compartment comprises a cation exchange material and an outlet in fluid communication with a conduit; an alkali metal chlorite solution in fluid communication with an inlet of the central compartment of the acidification cell; an effluent from the anode compartment in fluid communication with the inlet of the central compartment of the acidification cell; a water source in fluid communication with the anode and cathode compartments, wherein operation of the electrochemical acidification cell produces a first feedstream comprising chlorous acid from the conduit; and a vessel in fluid communication with the conduit and downstream from the electro chemical acidification cell, wherein the vessel is partially filled with water and comprises an outlet in fluid communication with the water; a cartridge having a lower portion with openings in fluid communication with the water; and a solid phase chlorine-containing material disposed within the cartridge, wherein a portion of the solid phase chlorine- containing material is submerged in the water within the cartridge to produce a dissolved chlorine-containing material within the vessel, wherein the system is configured to combine the first feedstream with the dissolved chlorine containing material within the vessel to produce the chlorine dioxide from the outlet.