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[Chemical Knowledge]：What are the upstream raw materials for concentrated sulfuric acid? What do the downstream products contain?

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Concentrated sulfuric acid is widely used in the field of chemical production raw materials, and its upstream and downstream related products are numerous. The following will introduce the main upstream and downstream related products of concentrated sulfuric acid in detail.

upstream products:

1. Sulfur: Sulfur is one of the main raw materials for the production of concentrated sulfuric acid. By burning sulfur and oxygen, sulfur dioxide gas can be generated, and sulfuric acid can be obtained by further reaction with water.
2. Smelting flue gas: The flue gas in the smelting process also contains sulfur dioxide. By introducing an absorbent to absorb the sulfur dioxide in the flue gas, and then through analysis, concentration and other processes, concentrated sulfuric acid can be obtained.

downstream products:

1. phosphate fertilizer: concentrated sulfuric acid can react with phosphate rock to produce phosphate fertilizer, such as superphosphate, diammonium phosphate, etc. Phosphate fertilizer is an indispensable fertilizer in agricultural production, which plays an important role in increasing crop yield and improving soil quality.
2. Nitrogen fertilizer: concentrated sulfuric acid can react with ammonia to produce nitrogen fertilizer, such as ammonium sulfate, ammonium bisulfate, etc. Nitrogen fertilizer plays an important role in promoting plant growth and increasing crop yield.
3. Hydrochloric acid: Concentrated sulfuric acid can react with sodium chloride to produce hydrochloric acid. Hydrochloric acid is widely used in chemical, pharmaceutical, food and other fields, such as the production of vinyl chloride, phenol and other chemicals.
4. titanium dioxide: concentrated sulfuric acid can be used in the production process of titanium dioxide. Titanium dioxide is an important inorganic pigment, with excellent whiteness, weather resistance, hiding power and other properties, widely used in coatings, plastics, paper and other fields.

In short, concentrated sulfuric acid plays an important role in the field of chemical production raw materials, and its upstream and downstream related products are numerous, involving agriculture, chemical industry, medicine and other fields.

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