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[Chemical Knowledge]：Production and manufacturing method and process flow of concentrated sulfuric acid

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The manufacturing method
of concentrated sulfuric acid
1. Introduction

Concentrated sulfuric acid is an important chemical product and is widely used in various industrial fields. Because of its unique properties, such as strong oxidation, dehydration and acidity, concentrated sulfuric acid has an important position in the field of chemical production raw materials. This article will detail the manufacturing method of concentrated sulfuric acid. The manufacturing principle of

2. concentrated sulfuric acid

concentrated sulfuric acid is mainly based on the following chemical reaction principle:

SO2 H2O 1/2 O2 → H2SO4

This reaction converts sulfur dioxide (SO2), water (H2O) and oxygen (O2) into sulfuric acid (H2SO4) under the action of a catalyst. In this process, the function of the catalyst is to reduce the activation energy of the reaction, so that the reaction can be carried out at a lower temperature.

3. concentrated sulfuric acid manufacturing process

1. raw material preparation

manufacturing concentrated sulfuric acid raw materials are mainly sulfur, pyrite, smelting flue gas and so on. Among them, sulfur and pyrite are the most commonly used raw materials. After treatment of these raw materials, a gas containing sulfur dioxide is obtained.

2. Catalyst preparation

The preparation of catalyst is an important link in the manufacture of concentrated sulfuric acid. Commonly used catalysts are vanadium catalysts and platinum catalysts. The preparation of the catalyst requires strict control of ingredients and preparation conditions to ensure the activity and stability of the catalyst.

3. Oxidation reaction

The gas containing sulfur dioxide is passed into the catalyst bed, and oxygen is passed into the catalyst. Under the action of the catalyst, the oxidation reaction occurs to generate sulfuric acid. This process needs to control the reaction temperature, gas flow and other parameters to ensure the smooth progress of the reaction.

4. Absorption and concentration of sulfuric acid gas generated

through the absorption tower, water absorption to generate dilute sulfuric acid. Dilute sulfuric acid and then through the concentration process, evaporation of excess water, to obtain concentrated sulfuric acid products. This process needs to control the pH value, temperature and concentration of the solution to ensure the quality of the product.

4.

1. The activity and stability of the catalyst have an important influence on the manufacturing process of concentrated sulfuric acid. Therefore, during the preparation and use of the catalyst, it is necessary to strictly control the ingredients and preparation conditions to improve the activity and stability of the catalyst. At the same time, it is also necessary to periodically regenerate or replace the catalyst to ensure the continuous progress of the reaction.

2. In the oxidation reaction process, it is necessary to control the reaction temperature, gas flow and other parameters to avoid the occurrence of side reactions and catalyst deactivation. At the same time, it is also necessary to monitor the reaction products in real time and adjust the process parameters in time to ensure the quality and yield of the products.

3. In the process of absorption and concentration, it is necessary to control the pH value, temperature and concentration of the solution to avoid equipment corrosion and product quality problems. At the same time, it is also necessary to carry out regular maintenance and maintenance of the equipment to ensure the normal operation and service life of the equipment.

5. conclusion The manufacturing method of

concentrated sulfuric acid involves the control of multiple links and process parameters, and requires strict operating procedures and safety measures. By mastering the manufacturing principle and manufacturing process of concentrated sulfuric acid, we can better understand the nature and application of concentrated sulfuric acid, and provide support for the development of chemical production raw materials.

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