Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.

Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.

Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.

Abstract: A process for producing peroxydisulfuric acid from a waste comprising substantially sulfuric acid, whereby the sulfuric acid is separated into sulfur trioxide and substantially water which is removed as a waste. The recovered sulfur trioxide is reacted with hydrogen peroxide to produce peroxydisulfuric acid which is fed to a methane-sulfonation process resulting in formation of sulfuric acid radicals. The sulfuric acid radicals react with methane producing methane radicals resulting in formation of sulfuric acid. The sulfuric acid from the methane-sulfonation process is recovered, reprocessed, and the process is repeated.

Abstract: A composition that generates and releases a biocidal solution comprising at least chlorine dioxide and hypobromous acid is presented. The composition comprises reactants capable of in-situ generation of chlorine dioxide and hypobromous acid, and a gelling agent that slows the rate of dissolution of the reactants, thereby increasing yield and providing a sustained release of biocidal solution. The chemical reaction is triggered when the reactants are contacted by a main solvent (e.g., water). Upon being exposed to the main solvent, the gelling agent forms a gelatinous structure that creates a chamber within the composition enclosing some of the reactants such that the in-situ generation takes place in the chamber. The gelatinous structure contributes to the high yield of the target product (e.g., chlorine dioxide) and its controlled release.

Abstract: An efficient cyclic process and related compositions for the in-situ generation of chlorine dioxide from dilute solutions of chlorite anions at near neutral pH. The cyclic process provides a means of safe and effective use of chlorine dioxide with reduced concern of chlorite accumulation in the aqueous system. The disclosed chemistry used to support the cyclic process can be applied independently or in various combinations that are effectively inert. This dramatically reduces safety concerns since the chlorine dioxide is produced in-situ to the application and in dilute concentrations. Also, the process allows for regeneration of inert anions such as bromide and chlorite thereby reducing operating cost.