Method for preparing hydrogen peroxide through anthraquinone technology

The invention discloses a method for preparing hydrogen peroxide through an anthraquinone technology. The method comprises the steps of a palladium catalyst fixed bed hydrogenation reaction, an air bubbling oxidation reaction, extraction and purification; the solvent of a working liquid comprises, by volume, 60-80% of trimethylbenzene, 0.5-25% of trioctyl phosphate, 0.5-25% of tetrabutyl urea, and 0.5-25% of 2-methylcyclohexyl acetate; and the reaction carrier in the working liquid is a 2-ethylanthraquinone and tetrahydro-2-ethylanthraquinone mixture, and the total content is 140-200g/L. The solubility of the reaction carrier in the solvent is large, and the concentration can reach 140-200g/L, so the conversion rate of the hydrogenation reaction is improved, and the hydrogen efficiency can reach 12-15g/L, thereby the productivity is improved; the density of the working liquid is lower than that of present working liquid systems, a difference between the density of the working liquid and the density of water is large, and the distribution coefficient of hydrogen peroxide in the extraction process is large, so extraction is facilitated, the concentration of hydrogen peroxide in a product is improved, and hydrogen peroxide with the content of 35-45% (wt) can be directly obtained through extraction; and the energy consumption and the material consumption of a device are reduced.