Method for producing an aqueous stable chlorine dioxide solution

摘要

The invention relates to a method for producing an ultrapure, aqueous, long-term- and storage-stable, and thus transportable chlorine dioxide solution, comprising the steps of providing chlorite, providing peroxodisulfate, and combining chlorite and peroxodisulfate in an aqueous system and in a molar ratio of peroxodisulfate to chlorite [S2O82−]/[ClO2−] of greater than 1, forming the aqueous chlorine dioxide solution, wherein no additional buffer is added to produce the aqueous chlorine dioxide solution. The invention further relates to a corresponding chlorine dioxide solution, to the use of said chlorine dioxide solution, and to a device for producing the chlorine dioxide solution.

主权项

1. A method for producing an aqueous chlorine dioxide solution containing chlorine dioxide in a quantity of 0.3 to 4.5 wt %, comprising the steps:
(a) providing chlorite, (b) providing peroxodisulfate, (c) combining chlorite and peroxodisulfate in an aqueous system and in a molar ratio of peroxodisulfate to chlorite [S2O82−]/[ClO2−] of greater than 1 to form the aqueous chlorine dioxide solution;
wherein the aqueous chlorine dioxide solution is produced in the absence of a buffer; andwherein the aqueous chlorine dioxide solution contains chlorine dioxide in a quantity of 0.3 to 4.5 wt. % is storage stable and transportable, and does not contain a buffer other than any buffer produced by a reaction between the chlorite and the peroxodisulfate.