Resumen
PROBLEM TO BE SOLVED: To provide a method for producing hydrogen peroxide, having an increased oxidation rate of a secondary alcohol and selectivity to the hydrogen peroxide by adding a primary alcohol and/or an ether to the secondary alcohol when producing the hydrogen peroxide by oxidizing the secondary alcohol in a liquid phase by molecular oxygen. SOLUTION: This method for producing hydrogen peroxide by oxidizing the secondary alcohol in a liquid phase by molecular oxygen is performed by oxidizing the secondary alciohol by mixing a primary alcohol and/or an ether to the secondary alcohol. The weight ratio of the secondary alcohol to the primary alcohol and/or the ether is generally about (90/10) to (10/90) with the proviso that the ratio is changed by the properties of the selected alcohol and ether. The oxidation reaction is performed at a temperature of about 60-160 deg.C under the whole pressure within a range of about 1 to 40kg/cm<2> . The primary alcohol and/or the ether preferably has neither a tertiary hydrogen atom nor a benzylic hydrogen atom.