Abstract: Composition in the form of an aqueous solution, useful for disinfecting hard surfaces comprises: a) from 0.0005% to 20% by weight of peracetic acid, b) from 0.001% to 45% by weight of acetic acid, c) from 0.001% to 35% by weight of hydrogen peroxide, d) from 0.0001% to 2% by weight of at least one compound of formula (I) (R1)(R2)(R3)N→O  (I) e) if desired, up to 2.5% by weight of at least one nonionic surfactant, and wherein f) the weight ratio between the compound of formula (I) and the peracetic acid is less than or equal to 1, and in that g) the weight ratio between the nonionic surfactant and the peracetic acid is less than or equal to 0.2.

Abstract: Composition in the form of an aqueous solution, useful for disinfecting hard surfaces comprises: a) from 0.0005% to 20% by weight of peracetic acid, b) from 0.001% to 45% by weight of acetic acid, c) from 0.001% to 35% by weight of hydrogen peroxide, d) from 0.0001% to 2% by weight of at least one compound of formula (I) (R1) (R2) (R3)N→O  (I) e) if desired, up to 2.5% by weight of at least one nonionic surfactant, and wherein f) the weight ratio between the compound of formula (I) and the peracetic acid is less than or equal to 1, and in that g) the weight ratio between the nonionic surfactant and the peracetic acid is less than or equal to 0.2.

Abstract: A plant for producing hydrogen peroxide by autooxidation of an anthraquinone derivative, including a catalytic hydrogenation vessel (1) supplied with hydrogen; an oxidizing vessel (2) supplied with an oxygen-containing fluid, particularly air; an extractor (3) supplied with water; and elements (7,16,19) for successively feeding a working solution containing at least one anthraquinone derivative dissolved in at least one organic solvent through the hydrogenation vessel (1), the oxidizing vessel (2) and the extractor (3), then recirculating it to the hydrogenation vessel (1). Elements (9,26) are provided for diverting at least part of the working solution from the extractor (3) to the oxidizing vessel (2) so that it bypasses the hydrogenation vessel (1). The plant is useful for producing hydrogen peroxide in situ in a paper pulp bleaching plant.