Abstract: A composition comprising a compound mixture dissolved in water, the compound mixture comprising at least one chlorite salt at least one cyclodextrin; and at least one alkaline base; provided that the cyclodextrin is in an amount of 0.13 to 13 parts by mass for every 50 parts by mass of chlorite anion ClO2?, and the alkaline base is in an amount of up to 13 parts by mass for every 50 parts by mass of chlorite anion ClO2?; wherein the composition has a pH of at least 12.5. A process for forming the composition and process for treating suspensions of particles with the composition are also disclosed.

Abstract: Devices and methods for safely using acid/chlorite ClO2 generator chemistry for water treatment, whereby a valve prevents chemical draw unless there is both vacuum within the reaction chamber as well as suitable water volume in the flow chamber for dilution, are described. The float-dependent valve can also allow for direct venting from the reaction chamber to the flow chamber in the event of elevated pressure in the reaction chamber. This approach delivers an inherently safer ClO2 generator design for systems that utilize high strength reactor zones with ClO2 concentration above 3,000 ppm.

Abstract: A composition comprising a compound mixture dissolved in water, the compound mixture comprising at least one chlorite salt at least one cyclodextrin; and at least one alkaline base; provided that the cyclodextrin is in an amount of 0.13 to 13 parts by mass for every 50 parts by mass of chlorite anion ClO2?, and the alkaline base is in an amount of up to 13 parts by mass for every 50 parts by mass of chlorite anion ClO2?; wherein the composition has a pH of at least 12.5. A process for forming the composition and process for treating suspensions of particles with the composition are also disclosed.

Abstract: A method for treating water with chlorine dioxide wherein the reactor is contained inside of the water supply line being treated and an eductor is used to draw in the chemical precursors. The method offers facilitated chlorine dioxide (ClO 2) generation and safer operation over wider ClO2 mass flow capacity, thus offering a more adaptable system for CLO2 treatments. Noise reduction and ease-of-use versus traditional eductor-based ClO2 generators are additional benefits from using this method.

Abstract: Provided is a process for the disinfection of raw water with chlorine dioxide and the removal of virtually all disinfection by-products. The process comprises contacting the water to be purified with a sufficient amount of gaseous chlorine dioxide to kill any microorganisms and thereby disinfect the water. The water is then stripped with air to remove ClO.sub.2 and any organic chemicals, with the resulting water then being contacted with a strong anion exchange resin to remove any by-products such as chlorite and chlorate ions formed in the disinfection process. The integrated process efficiently and effectively provides a water product which can contain essentially no chlorine dioxide, chlorite ions, chlorate ions or trihalomethanes, and which also is fully disinfected.

Abstract: Provided is a process for the preparation of chlorine dioxide. The process comprises separately feeding compounds, which when reacted together yield chlorine dioxide, into a diluting water stream. The compounds react to thereby form chlorine dioxide. Shutoff valves are provided in the feed lines of the compounds, which shutoff valves are in cooperation with a supply monitoring system and a pH meter. The supply monitoring system monitors the feed lines of the compounds and the water stream. When the monitoring detects a loss in the supply of the water or one of the compounds, shutoff valves are closed to restrict any further flow of the compounds through the feed lines. The pH meter is located downstream of the reaction and monitors the pH of the chlorine dioxide solution formed by the reaction. When the pH is detected to be outside of a particular range, the shutoff valve are closed to restrict any further flow of the compounds through the feed lines.

Abstract: Provided is a process for preparing a gaseous stream of chlorine dioxide. The process comprises first providing an aqueous stream of chlorine dioxide. The chlorine dioxide stream can be provided, for example, by reacting an alkali metal chlorite such as sodium chlorite with an alkali metal hypochlorite such as sodium hypochlorite and an inorganic acid such as hydrochloric acid, or by reacting chlorine gas and an alkali metal chlorite such as sodium chlorite. The resulting aqueous stream is then contacted in countercurrent fashion with a stream of inert gas or air, resulting in chlorine dioxide being stripped from the aqueous stream. A chlorine dioxide containing gaseous stream is then recovered, which is suitable for further use. The process thereby safely and efficiently generates a gaseous stream of chlorine dioxide for subsequent use.

Abstract: Provided is a novel composition which is the reaction product of chlorine dioxide and a polymer, and in particular, polymeric N-vinyl-.alpha.-pyrrolidone. The resulting product is an organically stabilized ClO.sub.2 composition which is a powerful microbiocide.