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

Polyphosphoric acid has a wide range of applications in the field of chemical production raw materials, and its upstream and downstream related products are numerous. The following will introduce in detail the main upstream and downstream associated products of polyphosphoric acid.

upstream products:

1. phosphoric acid: the production of polyphosphoric acid is mainly made of phosphoric acid as raw material through polymerization. Phosphoric acid is an important inorganic acid, which is widely used in food, medicine, agriculture and other fields.
2. Sulfuric acid: Sulfuric acid is used as a catalyst in the production of polyphosphoric acid to promote the polymerization of phosphoric acid. Sulfuric acid is a strong acid, which is widely used in chemical production.

downstream products:

1. Food additives: polyphosphoric acid can be used as food additives to adjust the acidity and taste of food. Common food additives such as acid, preservatives, etc., may be polyphosphoric acid as raw materials.
2. Fertilizer: Polyphosphoric acid can be used to produce phosphate fertilizer, increase the phosphorus content of soil and promote plant growth. Phosphate fertilizer is an indispensable fertilizer in agricultural production.
3. Plastics and rubber: Polyphosphoric acid can be used as an additive for plastics and rubber to improve their heat resistance, oxidation resistance and corrosion resistance. This plays an important role in the production of plastic and rubber products.
4. cleaning agent: polyphosphoric acid can be used to produce cleaning agent, remove rust and stains on the metal surface. This has a wide range of applications in the field of mechanical repair and maintenance.

From the above introduction, it can be seen that there are many upstream and downstream related products of polyphosphoric acid, involving food, medicine, agriculture, plastics, rubber, cleaning agents and other fields. The production and application of polyphosphoric acid has played an important role in promoting the development of the whole chemical industry.
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