Apparatus for the production of chlorine dioxide

Details Apparatus for the production of chlorine dioxide Apparatus for the production of chlorine dioxide

B - Operations, Transporting

01

J

23/390

B01J 19/18 (2006.01) B01J 10/00 (2006.01) C01B 11/02 (2006.01) F28F 21/06 (2006.01)

Patent

CA 1317093

Abstract of the Invention In accordance with the practice of this invention there is provided a process and apparatus for the preparation of chlorine dioxide which employs an improved chlorine dioxide generator comprising a small reaction chamber with means for injecting a concentrated metallic chlorate solution, a concentrated sulfuric acid solution, and gaseous sulfur dioxide. The sulfur dioxide gas is injected into the reaction chamber from the bottom through a porous medium which disperses the gas as extremely the bubbles into the aqueous reaction medium in the chamber. The reaction chamber is equipped with an internal Teflon braided cooling coil inserted therein which not only cools the reaction medium but also provides a tortuous path for the sulfur dioxide bubbles. By retarding the upward path of the bubbles, the sulfur dioxide is held in solution for a longer period of time allowing more time for reactant gas dissolution and corresponding chemical reaction. The reaction chamber is maintained under superatmospheric pressure so that the chlorine dioxide that is produced is maintained in solution. Keeping the reaction chamber under pressure, as opposed to atmospheric pressure operation, also promotes sulfur dioxide solubility. Because the chlorine dioxide isn't handled in a separate gas phase, operation of the unit is more simple and inherently safer than prior art systems which handle chlorine dioxide as a gas.

556325

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