Method for producing hydrogen peroxide by direct synthesis

Details Method for producing hydrogen peroxide by direct synthesis Method for producing hydrogen peroxide by direct synthesis

C - Chemistry, Metallurgy

01

B

C01B 15/029 (2006.01) B01J 8/02 (2006.01)

Patent

CA 2328107

The invention relates to a method for producing an aqueous solution of hydrogen peroxide from hydrogen and oxygen by direct synthesis in the presence of a heterogeneous catalyst. According to this method, a mixture containing H2 and O2 is supplied to the reactor which contains the catalyst. Said gas mixture is essentially saturated or oversaturated (= containing mist) with water vapour. The volume ratio of gas mixture (Nl/h) supplied to liquid (l/h) taken off is adjusted to values equal to or greater than 15,000, especially 20,000 to 50,000 and the gas mixture leaving the reactor is re-stocked with H2, O2 and H2O vapour and recycled. According to the invention, solutions with a high concentration of H2O2 can be obtained without any further concentration.

L'invention concerne une solution aqueuse de péroxyde d'hydrogène produite par synthèse directe d'hydrogène et d'oxygène en présence d'un catalyseur hétérogène. Selon l'invention, un mélange gazeux contenant H¿2? et O¿2? est amené dans le réacteur qui abrite un catalyseur. Ce mélange gazeux est sensiblement saturé ou sursaturé (= nébuleux) en vapeur d'eau. Le rapport des volumes Mélange gazeux apporté (Nl/h)/liquide prélevé (l/h) est réglé à des valeurs supérieures ou égales à 15.000, notamment 20.000 à 50.000. Le mélange gazeux qui quitte le réacteur, est recyclé avec H¿2?, O¿2? et la vapeur d'eau après stockage. Selon l'invention, on obtient des solutions de concentration élevée en H¿2?O¿2? sans concentration supplémentaire.

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