Who knows how sulfuric acid is produced? What is the main raw material for production?

Sulfur or pyrite is first burned or roasted in air to obtain sulfur dioxide gas.

The oxidation of sulfur dioxide to sulfur trioxide is the key to the production of sulfuric acid, and its reaction is: 2SO2 + O2 2SO3

This reaction is practically impossible to take place at room temperature and in the absence of catalysts.

According to the different pathways of sulfur dioxide to sulfur trioxide, the methods of making sulfuric acid can be divided into contact method and nitrification method.

The contact method uses vanadium pentoxide V2O5 containing potassium oxide or potassium sulfate (co-urge) supported on diatomaceous earth as a catalyst to convert sulfur dioxide into sulfur trioxide.

The nitrification method uses nitrogen oxide as an oxygen transmitter to oxidize sulfur dioxide into sulfur trioxide: SO2 + N2O3 + H2O H2SO4 + 2NO

According to the different equipment used, the nitrification method is divided into the lead chamber method and the tower method, and now the lead chamber method has been eliminated; The sulfuric acid concentration produced by the tower method is only 76; The contact method can produce sulfuric acid with a concentration of more than 98; Most adopted.

Main Equations:

4fes2+11o2=2fe2o3+8so2

2so2+o2=2so3

so3+h2o=h2so4

When I was in high school, I had a special sulfuric acid industry to learn.

See the textbook Exposure to Sulfuric Acid.

In the factory, it is produced with raw materials such as sulfur!

There are two common methods, 1Pyrite smelting.

2.Incineration of sulfur.

The reaction principle of the industrial production method of sulfuric acid is as follows:1. Calcined pyrite: 4FeS2 + 11O2 = (high temperature) 8SO2 + 2FE2O3.

2. Catalytic oxidation of SO2: 2SO2 + O2 = (catalyst, high temperature) 2SO3.

3. Absorption, absorption with concentrated sulfuric acid, and then dilution of the required concentration of sulfuric acid: SO3 + H2O = H2SO4.

Physicochemical propertiesIndustrial sulfuric acid is an oily liquid, which generally looks colorless and transparent, the density of sulfuric acid is greater than that of water, and it releases a lot of heat when dissolved in water; It is strongly corrosive and dehydrating. It is mainly divided into concentrated sulfuric acid, dilute sulfuric acid, oleum sulfuric acid, liquid sulfur trioxide, battery sulfuric acid, etc., and also produces high-concentration oleum sulfuric acid, liquid sulfur dioxide, ammonium sulfite and other products.

The above content reference: Encyclopedia - Sulfuric Acid Industry.

The work mainly includes: (1) operating the roaster, controlling the process parameters such as flow, temperature, and pressure, and making sulfur-containing substances into sulfur dioxide gas in the city; (2) Regulate the temperature, pressure, flow rate and liquid level of the waste heat boiler to produce non-medium pressure steam; (3) Operate dust removal, cooling and humidification, defogging, drying and other equipment to purify sulfur dioxide gas; (4) Regulate the converter to control sulfur trioxide gas such as temperature, pressure, and flow; (5) Operate the absorption tower, regulate the process parameters such as temperature, concentration, liquid level, etc., and absorb sulfur trioxide gas to produce sulfuric acid; (6) Maintain equipment and deal with accidents in the production process.

The following types of work are classified as occupations:

Sulfide roaster (16-001), sulfur dioxide gas purifier (16-002), sulfur dioxide gas conversion worker (16-003), acid gas absorption worker (16-006).

<>1. Sulfur or pyrite is also sulfur concentrate.

2. Sulfuric acid (H2SO4), sulfur trioxide and water compounds. According to the different content of sulfur trioxide, it can be divided into aqueous sulfuric acid, anhydrous sulfuric acid and oleum sulfuric acid. When the molecular ratio of SO3 to H2O is less than 1, it is aqueous sulfuric acid, and its solute mass fraction is less than 100. When the molecular ratio is equal to 1, it is anhydrous sulfuric acid, and its concentration is 100; When the molecular ratio is greater than 1, it is oleum, and its solute mass brightness fraction is greater than 100.

Anhydrous sulfuric acid is a colorless and transparent, highly corrosive oily liquid, density, melting point, boiling point 330. When pure sulfuric acid is heated, SO3 is released, and when the solute mass fraction is reached, it becomes a constant boiling solution, and its boiling point is 338 and the density is Qi burning. Concentrated sulfuric acid can be dissolved in water to form a series of hydrates H2SO4·NH2O(N), which are very stable; Therefore, it has strong water absorption and is a widely used desiccant and dehydrating agent.

The hydration process of concentrated sulfuric acid releases a large amount of heat, and when each mole of H2SO4 is dissolved, it is exothermic that when diluting concentrated sulfuric acid, it is necessary to slowly introduce concentrated sulfuric acid into the water through the glass rod, and constantly stir, concentrated sulfuric acid can remove hydrogen and oxygen elements from some organic matter composed of carbon, hydrogen and oxygen elements according to the composition ratio of water.

The work mainly includes: (1) operating the roaster, controlling the process parameters such as flow, temperature, and pressure, and making sulfur-containing substances into sulfur dioxide gas in the city; (2) Regulate the temperature, pressure, flow rate and liquid level of the waste heat boiler to produce non-medium pressure steam; (3) Operate dust removal, cooling and humidification, defogging, drying and other equipment to purify sulfur dioxide gas; (4) Regulate the converter to control sulfur trioxide gas such as temperature, pressure, and flow; (5) Operate the absorption tower, regulate the process parameters such as temperature, concentration, liquid level, etc., and absorb sulfur trioxide gas to produce sulfuric acid; (6) Maintain equipment and deal with accidents in the production process.

The following types of work are classified as occupations:

Sulfide roaster (16-001), sulfur dioxide gas purifier (16-002), sulfur dioxide gas conversion worker (16-003), acid gas absorption worker (16-006).