Direct synthesis of hydrogen peroxide by heterogenous...

C - Chemistry – Metallurgy – 01 – B

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C01B 15/029 (2006.01) B01J 23/44 (2006.01) B01J 27/053 (2006.01) B01J 27/055 (2006.01) B01J 27/185 (2006.01)

Patent

CA 2105568

Method for the direct synthesis of an aqueous solution of hydrogen peroxyde from hydrogen and oxygen by hydrogenous catalysis in a three-phase system in which the hydrogen and oxygen are reacted directly in a gas state, at a pressure above atmospheric pressure, on the surface of a solid hydrogenous catalyst in suspension in a granular state in an aqueous liquid phase, said catalyst consisting of a metal compound selected from pure palladium or an association of palladium with at least one other noble metal, and impregnated on a substrate comprising at least one compound selected from alkaline-earth metal sulfates or phosphates. A catalyst is disclosed for the production of an aqueous liquid phase of hydrogen peroxyde consisting of a metal compound selected from pure palladium or an association of palladium with at least one another noble metal, and impregnated on a substrate comprising at least one compound selected from alkaline-earth metal sulfates or phosphates. A method of preparing the catalyst by precipitation of the palladium or palladium mixture with at least one other noble metal on the granular substrate is also disclosed.

2105568 9215520 PCTABS00160 Procédé pour la synthèse directe d'une solution aqueuse de peroxyde d'hydrogène à partir d'hydrogène et d'oxygène par catalyse hétérogène dans un système triphasique selon lequel on fait réagir directement l'hydrogène et l'oxygène à l'état gazeux sous une pression supérieure à la pression atmosphérique à la surface d'un catalyseur hétérogène solide mis en suspension à l'état de granules dans une phase aqueuse liquide, le catalyseur étant constitué d'un composé métallique choisi parmi le palladium pur ou une association de palladium avec au moins un autre métal noble et imprégné sur un support comprenant au moins un composé choisi parmi les sulfates ou les phosphates de métaux alcalino-terreux. Catalyseur pour la production d'une phase aqueuse liquide de peroxyde d'hydrogène constitué d'un composé métallique choisi parmi le palladium pur ou une association de palladium avec au moins un autre métal noble et imprégné sur un support comprenant au moins un composé choisi parmi les sulfates ou les phosphates de métaux alcalino-terreux. Procédé de préparation du catalyseur par précipitation du palladium ou du mélange du palladium avec au moins un autre métal noble sur les granules de support.

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