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[Chemical Knowledge]：Production method and process of hydrogen peroxide

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The manufacturing method
of hydrogen peroxide
Hydrogen peroxide (H2O2) is an important inorganic chemical, which is widely used in bleaching, oxidation, disinfection and other fields. In the field of raw materials for chemical production, the main methods for producing hydrogen peroxide are electrolysis, anthraquinone, isopropanol, etc. This article will detail these three manufacturing methods.

1. electrolysis method

electrolysis method uses sulfuric acid as an electrolyte, generates hydrogen and oxygen by electrolyzing water, and then reacts hydrogen and oxygen to generate hydrogen peroxide. The specific steps are as follows:

1. Preparation of electrolyte: sulfuric acid and water are mixed in a certain proportion to make an electrolyte.
2. Water electrolysis: the electrolyte into the electrolytic cell, into the direct current, water at the anode is oxidized to oxygen, hydrogen ions at the cathode is reduced to hydrogen.
3. Synthesis of hydrogen peroxide: the generated hydrogen and oxygen are mixed in a certain proportion, introduced into the reactor, and reacted to generate hydrogen peroxide under the action of a catalyst.

electrolysis has the advantages of simple process and convenient operation, but the energy consumption is high and the production cost is high.

2. anthraquinone method

anthraquinone method is the main method of producing hydrogen peroxide at present, the principle is to use anthraquinone organic compounds as a carrier to react with hydroperoxide under certain conditions to generate hydrogen peroxide and anthraquinone compounds, and then separate hydrogen peroxide by distillation and other methods. The specific steps are as follows:

1. Preparation of working fluid: the anthraquinone organic compounds and solvents are mixed according to a certain proportion to make working fluid.
2. Hydrogenation: The working liquid is introduced into a hydrogenation reactor and reacts with hydrogen to generate hydroperoxides and anthraquinone compounds under the action of a catalyst.
3. Oxidation: The hydrogenated working liquid is introduced into an oxidation reactor to react with air to generate hydrogen peroxide and anthraquinone compounds.
4. Extraction: hydrogen peroxide is separated from the working liquid by distillation and other methods to obtain hydrogen peroxide products.

anthraquinone method has the advantages of continuous production process, stable operation and high product quality, so it is widely used in hydrogen peroxide production.

3. isopropanol method

isopropanol method is a relatively new method for the production of hydrogen peroxide, the principle is to oxidize isopropanol under certain conditions to produce hydrogen peroxide and acetone, and then separate hydrogen peroxide by distillation and other methods. The specific steps are as follows:

1. oxidation reaction: isopropanol and oxygen are introduced into a reactor, and hydrogen peroxide and acetone are generated by reaction under the action of a catalyst.
2. Separation and purification: hydrogen peroxide is separated from the reaction solution by distillation and other methods to obtain hydrogen peroxide products.

isopropanol method has the advantages of easy access to raw materials and mild reaction conditions, but the product concentration is low, and further improvement of separation and purification technology is needed.

To sum up, the electrolysis method, the anthraquinone method and the isopropanol method are all effective methods for producing hydrogen peroxide, and each method has its advantages, disadvantages and scope of application. In actual production, the appropriate production method should be selected according to the specific situation to improve product quality and production efficiency.

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