Method for producing chlorine dioxide using chemically impregnated zeolite
AssigneesKlatte Inc., Environmental Safety Systems, Inc.
InventorsFred Klatte, James Aamodt
Life of this patent
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Abstract
A method for producing chlorine dioxide by moving fluid (such as air) relative to (e.g. flowing the fluid through) a first bed of zeolite crystals impregnated with at least one of the following: phosphoric acid, acetic acid and citric acid, and then moving the fluid relative to a second bed of zeolite crystals impregnated with sodium chlorite and/or zeolite crystals impregnated with chlorine. Optionally, at least some of the produced chlorine dioxide is absorbed by moving the fluid relative to (e.g., flowing the fluid through) a third bed of chemically impregnated zeolite crystals.
Claims19
A method for producing chlorine dioxide, including the steps of:
- (a) moving a fluid containing oxygen through a first bed of impregnated zeolite crystals which are impregnated with at least one of the following impregnating agents:
- phosphoric acid, acetic acid, and citric acid;
- and
- (b) after step (a), moving the fluid through a second bed of impregnated zeolite crystals which are impregnated with at least sodium chlorite, thereby producing the chlorine dioxide as a result of chemical reaction of the fluid and said sodium chlorite and said at least one of the impregnating agents.
A method for producing chlorine dioxide in a fluid, and then removing at least some of the chlorine dioxide from the fluid, including the steps of:
- (a) moving a fluid containing oxygen through a first bed of impregnated zeolite crystals which are impregnated with at least one of the following impregnating agents:
- phosphoric acid, acetic acid, and citric acid;
- and
- (b) after step (a), moving the fluid through a second bed of impregnated zeolite crystals which are impregnated with at least sodium chlorite, thereby producing the chlorine dioxide as a result of chemical reaction of the fluid and said sodium chlorite and said at least one of the impregnating agents,
- (c) after step (b), moving the fluid through a third bed of zeolite crystals which are impregnated with at least one of the following agents:
- potassium hydroxide, sodium sulfite, sodium bisulfite, and ferrous sulfate, thereby causing at least some of the chlorine dioxide to be removed from the fluid.
A method for producing chlorine dioxide, including the steps of:
- (a) moving a first set of impregnated zeolite crystals through a fluid containing oxygen wherein the impregnated zeolite crystals are impregnated with at least one of the following impregnating agents:
- phosphoric acid, acetic acid, and citric acid;
- and
- (b) after step (a), moving a second set of impregnated zeolite crystals through the fluid, wherein the impregnated zeolite crystals in the second set are impregnated with at least sodium chlorite, thereby producing the chlorine dioxide as a result of chemical reaction of the fluid and said sodium chlorite and said at least one of the impregnating agents.
Dependencies are inferred from the claim text.