Вибір промоторів для електрохімічного синтезу пероксиоцтової кислоти

Abstract

A high-purity peroxyacetic acid may be produced by electrochemical method. The necessity of using peroxo group promoters is justified. The effect of the additions of CNS⁻, I⁻, Cl⁻, Br⁻ ions on the kinetics of anodic processes in an aqueous 3 mol/dm³ acetic acid solution with sulfuric acid addition have been investigated by the voltammetry method on a platinum electrode. The addition of CNS⁻, I⁻, Cl⁻, Br⁻ ions to the electrolyte composition leads to inhibition of the combined anodic oxygen evolution process. Additions of I⁻, Cl⁻, Br⁻ ions to the electrolyte for electrochemical synthesis of peroxyacetic acid are expedient to use, they contribute to achieving the maximum current efficiency of the final product (1,2 ... 1,5 %). The concentration of additions of ions I⁻, Cl⁻, Br⁻ should not exceed 0,001 mol/dm³. Electrochemical synthesis of peroxyacetic acid is advisable to conduct in the range of current densities of 500…1500 A/m², at which the maximum current efficiency of the target product is observed.