Method for preparing hydrogen peroxide
A technology of hydrogen peroxide and oxidizing solution, applied in chemical instruments and methods, peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of shortening the service life of compressors , Catalyst particle breakage, hydrogen peroxide decomposition and other problems, to achieve the effect of avoiding air resistance, saving energy consumption and stable operation
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[0015] A method for preparing hydrogen peroxide, comprising: introducing a working fluid and a hydrogen-containing gas into a hydrogenation reactor; in the presence of a catalyst, the working fluid reacts with hydrogen; after gas-liquid separation, the gas is discharged from a gas outlet; and the slurry is filtered The clear liquid obtained afterward is a hydrogenated liquid; the hydrogenated liquid reacts with oxygen in an oxidation reactor to obtain an oxidized liquid containing hydrogen peroxide; the oxidized liquid is extracted and separated in an extraction tower to obtain a hydrogen peroxide solution and a working liquid; the hydrogenation reaction The reactor is a slurry bed reactor.
[0016] The method provided by the invention comprises a hydrogenation reaction unit, an oxidation reaction unit and an extraction unit.
[0017] (1) Hydrogenation reaction unit:
[0018] In the method provided by the present invention, the hydrogenation reactor used in the hydrogenation ...
Embodiment 1
[0074] Embodiment 1 illustrates the effect of a method for preparing hydrogen peroxide provided by the invention.
[0075] The reaction process is attached figure 1 As shown, the hydrogenation reactor adopts the attached figure 2 In the slurry bed reactor shown, the diameter of the guide tube is 150mm, the diameter of the cap is 300mm, and the diameter of the expanding section is 500mm. The height that the cap extends into the expanding diameter section is 3000mm, and the height that the guide tube extends into the cap is 2000mm.
[0076] Mixed gas of hydrogen and nitrogen in standard state 80m 3 / h enters the slurry bed reactor through the gas phase inlet 2, and the reactor pressure is established at 0.4MPa. Working fluid 2m preheated to 50°C by heater 3 / h enters the hydrogenation reactor from the liquid phase inlet. After the working fluid circulation is established, 50 kg of hydrogenation catalyst is added to the hydrogenation reactor. The working liquid in the hydr...
Embodiment 2
[0082] The device and flow process that adopt are the same as embodiment 1, and the mixed gas of standard state hydrogen and nitrogen that the hydrogenation unit enters is 70m 3 / h, the air volume into the oxidation reactor is 96Nm 3 / h, other conditions are with embodiment 1. The hydrogen effect of the hydrogenation liquid clear liquid is 10.1g / l, and the final product is a 35% hydrogen peroxide solution.
[0083] It can be seen from Examples and Comparative Example 1 that the hydrogen efficiency of the hydrogen peroxide preparation method provided by the present invention can be increased to more than 10g / l, and the concentration of the prepared hydrogen peroxide solution can also be correspondingly increased to more than 30%. It has good economic benefits and contributes to energy saving, consumption reduction and environmental protection of downstream industries.
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