Manufacturing Method of Hydrogen Peroxide
Hydrogen peroxide (H2O2) is an important inorganic chemical widely used in bleaching, oxidation, disinfection and other fields. In the field of raw materials for chemical production, the main manufacturing methods of hydrogen peroxide are electrolysis, anthraquinone method and isopropanol method. This article will introduce these three manufacturing methods in detail.
I. Electrolysis method
Electrolysis method takes sulfuric acid as electrolyte, generates hydrogen and oxygen through electrolysis of water, and then reacts the hydrogen and oxygen to generate hydrogen peroxide. Specific steps are as follows:
1. Preparation of electrolyte: mix sulfuric acid and water in a certain proportion to make electrolyte.
2. Electrolysis of water: Pass the electrolyte into the electrolyzer and pass DC current, water is oxidized to oxygen at the anode and hydrogen ions are reduced to hydrogen at the cathode.
3. Synthetic Hydrogen Peroxide: The generated hydrogen and oxygen are mixed in a certain proportion and introduced into a reactor, where they react to produce hydrogen peroxide under the action of a catalyst.
Electrolysis method has the advantages of simple process and convenient operation, but the energy consumption is higher and the production cost is larger.
Two, anthraquinone method
Anthraquinone method is the main method of producing hydrogen peroxide at present, and its principle is to use anthraquinone organic compounds as carriers, so that it reacts with hydroperoxides under certain conditions to generate hydrogen peroxide and anthraquinone compounds, and then separates the hydrogen peroxide through distillation and other methods. The specific steps are as follows:
1. Preparation of working solution: anthraquinone organic compounds and solvents are mixed in a certain proportion to make a working solution.
2. Hydrogenation: The working solution is passed into a hydrogenation reactor, where it reacts with hydrogen under the action of a catalyst to generate hydroperoxides and anthraquinones.
3. Oxidation: The hydrogenated working solution is passed into an oxidation reactor where it reacts with air to form hydrogen peroxide and anthraquinones.
4. Extraction: Hydrogen peroxide is separated from the working solution by distillation, etc. to obtain the hydrogen peroxide product.
Anthraquinone method has the advantages of continuous production process, stable operation and high product quality, so it is more widely used in the production of hydrogen peroxide.
Third, isopropanol method
Isopropanol method is a relatively new method of producing hydrogen peroxide, the principle is to oxidize isopropanol under certain conditions to generate hydrogen peroxide and acetone, and then through distillation and other methods to separate out hydrogen peroxide. Specific steps are as follows:
1. Oxidation: Isopropanol and oxygen are passed into the reactor, and hydrogen peroxide and acetone are generated by the reaction under the action of catalyst.
2. Separation and purification: Hydrogen peroxide is separated from the reaction solution by distillation and other methods to obtain the hydrogen peroxide product.
Isopropanol method has the advantages of easy availability of raw materials and mild reaction conditions, but the concentration of the product is low, and the separation and purification technology needs to be further improved.
In summary, electrolysis method, anthraquinone method and isopropanol method are effective methods for producing hydrogen peroxide, and each method has its advantages and disadvantages and scope of application. In the actual production, the suitable production method should be selected according to the specific situation in order to improve product quality and production efficiency.
