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Preparation method of hydrogen peroxide

A technology of hydrogen peroxide and oxidizing liquid, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, inorganic chemistry, etc. Catalyst deactivation and other problems, to achieve the effect of simple device structure, easy installation and maintenance, and high hydrogen efficiency

Inactive Publication Date: 2015-02-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the gradient distribution of catalyst particle concentration in the settling zone, the concentration of catalyst particles at the bottom of the settling zone is high, resulting in excessive reaction, especially when used in exothermic reactions, it is easy to cause adverse consequences such as coking and catalyst deactivation

Method used

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  • Preparation method of hydrogen peroxide
  • Preparation method of hydrogen peroxide
  • Preparation method of hydrogen peroxide

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preparation example Construction

[0016] 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.

[0017] The method provided by the invention comprises a hydrogenation reaction unit, an oxidation reaction unit and an extraction unit.

[0018] (1) Hydrogenation reaction unit:

[0019] In the method provided by the present invention, the hydrogenation reactor used in the hydrogenation ...

Embodiment 1

[0075] as attached image 3 As shown, the hydrogenation reaction unit adopts a slurry bed reactor. The diameter of the reaction cylinder is 300, the diameter of the separator is 800; the diameter of the washing section is 300, and the BX500 packing with a height of 300mm is installed inside. Pure hydrogen 42Nm 3 / h enters the slurry bed reactor through the gas inlet, and 4.8m working fluid preheated to 60°C by the heater 3 / h enters the slurry bed reactor from the liquid phase inlet, and 72kg of catalyst is added to the slurry bed reactor from the catalyst feeding port. Under the reaction conditions of 60°C and 0.4MPa, the anthraquinone in the working fluid undergoes hydrogenation reaction to form a hydrogenated fluid. The formed hydrogenated liquid slurry is passed through the filter, using three sets of parallel filters with metal filter elements inside, and the hydrogenated liquid clear liquid is used as the backflush liquid, and backwashed every 1 hour. The filtered sl...

Embodiment 2

[0080] The device and flow process that adopt are the same as embodiment 1, and the amount of pure hydrogen that the hydrogenation unit enters is 32Nm 3 / h, the intake air volume of the oxidation reactor is 198Nm 3 / h, the pure water containing phosphoric acid that the extraction unit enters is 73kg / h, and other conditions are the same as 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.

[0081] As can be seen from Examples 1, 2 and Comparative Example 1, 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 increased to more than 30% accordingly. It has good economic benefits and contributes to energy saving, consumption reduction and environmental protection of downstream industries.

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Abstract

A preparation method of hydrogen peroxide is as follows: a working liquid and a hydrogen-containing gas are introduced into a slurry bed reactor, in the presence of a catalyst, the working liquid reacts with hydrogen to obtain a hydrogenated liquid, the hydrogenated liquid reacts with oxygen in an oxidation reactor to obtain an oxidizing solution containing hydrogen peroxide; the oxidizing solution is extracted and separated to obtain a hydrogen peroxide solution and a working fluid, the slurry bed reactor comprises a reaction cylinder (1), a separator (2) and a filter (3), a top opening of the reaction cylinder (1) extends into the separator (2), the outer wall of the reaction cylinder (1) is connected with the bottom of the separator (2), the separator (2) is communicated with the filter (3) by a liquid phase outlet (14), and a slurry outlet of the filter (3) is communicated with the bottom of the reaction cylinder (1). The method provided by the invention is stable in operation and easy in industrialization amplification. In the process of preparing of hydrogen peroxide, no alkali is introduced, and the danger of explosion led by hydrogen peroxide decomposition caused by an alkali can be 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 高国华杨克勇李红波潘智勇朱振兴宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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