Hydrogenation method for preparing hydrogen peroxide by adopting anthraquinone process

Abstract

The invention relates to a hydrogenation method for preparing hydrogen peroxide by adopting an anthraquinone process. The hydrogenation method comprises the following steps: introducing gas containing hydrogen gas and an anthraquinone working liquid into a fluidized bed of solid particles containing a catalyst, wherein the hydrogenation pressure is 0.15-0.35MPa, and the hydrogenation temperature is 40-75 DEG C; and keeping bubbles or turbulent flow in the fluidized bed in the hydrogenation process, wherein the total linear speed of the hydrogen-containing gas is 2-30cm/s, the hydrogen gas accounts for 40-100% of the total volume of the gas, and the rest is nitrogen gas, the concentration of a settling bed of the fluidized bed is not lower than 0.3g/cm<3>, the solid particle density in the fluidized bed is less than 0.3g/cm<3>, the particle size distribution range is 20-300 microns, the concentration of anthraquinone in the anthraquinone working liquid is 120-200g/L. After the hydrogenation method disclosed by the invention is adopted, the production efficiency can be improved by 40% on the basis of an existing domestic fixed bed hydrogenation method; risk factors in the production are substantially solved from the production principle and the production process, so that the product concentration is improved to over 40% from 30%; main product quality indexes such as the content of organic carbon and the content of nonvolatile matters are better than the quality indexes of a product produced by adopting a fixed bed process.

Description

[technical field] [0001] The present invention relates to the hydrogenation method in the preparation of hydrogen peroxide by anthraquinone method. [Background technique] [0002] In the prior art, the preparation of hydrogen peroxide is generally realized by the anthraquinone method. The anthraquinone method uses 2-ethylanthraquinone as a carrier, palladium (or nickel) as a catalyst, and is formed by H 2 and O 2 direct synthesis of H 2 o 2 . It is divided into four processes: hydrogenation, oxidation, extraction and post-treatment. [0003] The hydrogenation process generally adopts a fixed-bed process, using alkyl anthraquinone as a carrier, and using heavy aromatics and tetrabutylurea as a solvent to form a working solution. Under certain pressure, temperature and the presence of a palladium catalyst, the working fluid undergoes a hydrogenation reaction with hydrogen to generate a solution containing the corresponding alkylhydroanthraquinone (referred to as the hydr...

AI Technical Summary

Problems solved by technology

[0005] Although the fixed bed anthraquinone production process has a large output, it also shows many shortcomings such as low production efficiency,

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