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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

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the catalyst particles are carried out of the reaction system by the gas, it will cause great loss
Even if a compressor is used to circulate the lifting gas back to the reactor, the catalyst particles carried out will cause wear and tear on the compressor on the one hand and shorten the service life of the compressor, and on the other hand will cause the catalyst particles to break into smaller particles and cannot be filtered The device intercepts and enters the oxidation reactor, causing hydrogen peroxide to decompose, and in severe cases, an explosion will occur

Method used

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preparation example Construction

[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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Abstract

The invention discloses a method for preparing hydrogen peroxide. A working liquid and a hydrogen-containing gas are introduced into a slurry bed reactor; a hydrogenated liquid is obtained by reaction in the existence of a catalyst; the hydrogenated liquid reacts with oxygen to obtain the hydrogenated liquid containing hydrogen peroxide in an oxidation reactor; oxidized liquid is extracted and separated from an extraction tower to obtain a hydrogen peroxide solution and working liquid; the slurry bed reactor comprises a cap (12), an expanding section (13) and a draft tube (11); the expanding section (13) is positioned at the lower part of the cap (12); the pipe diameter of the expanding section (13) is greater than that of the cap; the draft tube (11) is arranged in the expanding section (13); the pipe diameter of the draft tube (11) is smaller than that of the cap (12); a bottom opening of the cap (12) extends into the expanding section (13); the outer wall of the cap (12) is connected with the top of the expanding section (13); an upper opening of the draft tube (11) extends into the cap (12); and an opening is formed in the lower part of the draft tube (11). The method disclosed by the invention is stable to operate, and easy for realization of industrial enlargement; no alkali is introduced in the process of preparing hydrogen peroxide; and the risk of explosion caused by hydrogen peroxide decomposition is avoided.

Description

technical field [0001] The invention relates to a method for preparing hydrogen peroxide. Background technique [0002] Hydrogen peroxide is a kind of green chemical product. It has almost no pollution during its production and use, so it is called a "clean" chemical product. It is widely used as oxidizing agent, bleaching agent, disinfectant, deoxidizer, polymer initiator and crosslinking agent. Used in chemical industry, papermaking, environmental protection, electronics, food, medicine, textile, mining, agricultural waste processing and other industries. [0003] At present, the production methods of hydrogen peroxide mainly include electrolysis method, isopropanol method, oxygen cathode reduction method, hydrogen-oxygen direct chemical method, vacuum enrichment method and anthraquinone method. Among them, the anthraquinone method is the mainstream method for the production of industrial hydrogen peroxide, and more than 99% of the global industrial hydrogen peroxide is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
CPCC01B15/023
Inventor 李红波杨克勇高国华潘智勇朱振兴宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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