Chemistry of Chlorites

Abstract

A comprehensive review of the chemistry of chlorites is presented. The following are four of the most important items of the newer knowledge given:The decomposition of chlorites in acid solution produces both chlorine dioxide and chlorates in a molar ratio usually greater than 2 to 1, respectively, which is nearly independent of the conditions. The rate of the decomposition is greatly influenced by conditions, especially pH.The reaction between hypochlorite and chlorite also varies with pH. The primary 60 60 60 60 60

Absorption of NO in an Aqueous Solution of NaClO2

“…[16,17] However, large amounts of ClO 2 were formed, although the solution was strongly alkaline, pH > 10. Since hydroxide ions are consumed during the absorption, the pH of the liquid film will be lower than the measured pH of the liquid bulk.…”

“…2 ClO 2 + Cl ± + OH ± (16) This reaction occurs when the pH drops below 10. [16,17] The reaction rate is slow at high pH values, but since ClO 2 is a very irritating gas, even very small amounts of ClO 2 are perceptible. The formation of ClO 2 through reaction (16) at high pH has been verified by mixing a hypochlorite solution and a chlorite solution.…”

Mécanisme des réactions du chlorite et du dioxyde de chlore. 2. Cinétique des réactions du chlorite en présence d'ortho-tolidine

“…En absence de chlorure 1'Cq. [2] est la plus frCquemment citCe mais des Ccarts importants ont Cte observes (refs. 1 a 8).…”

Absorption of NO in Aqueous NaClO2/Na2CO3 Solutions

“…However, due to the decomposition of NaClO 2 in the acidic solution (Eq. (1)), the pH value decreases slowly once it goes lower than 5 [8,10].…”

“…The reaction in Eq. (1) only occurs in a weakly acidic chlorite solution, i.e., pH < 5 [8,10]. One possible option is to have an absorption solution with a high concentration of hydroxide ions.…”