1. Core Area of ​​Organic Synthesis:
It is a key cyclizing agent, acylating agent, and dehydrating agent in this field. It can catalyze intramolecular cyclization reactions of compounds such as carboxylic acids and ketones to synthesize quinolines and quinones, and can also catalyze the synthesis of heterocyclic compounds such as thiophenes; it can also be used in Friedel-Crafts reactions, amino acid rearrangements, and other reactions. Simultaneously, it catalyzes esterification reactions in fragrance synthesis to produce special fragrant esters, improves reaction selectivity and yield in drug synthesis, and is also an important raw material for the synthesis of phosphate esters and high-molecular-weight polyphosphate esters.

2. Petroleum Refining Field:
It can be used as a catalyst for alkylation reactions, promoting the reaction of olefins with hydrocarbons such as isobutane to produce high-octane gasoline components, thereby improving the quality and performance of gasoline, meeting the requirements of modern automobiles. In addition, it can also be used as a fuel additive to help optimize the relevant properties of petroleum products.

3. Building Materials Modification Field:
It is commonly used in asphalt modification. When blended with asphalt, it forms chemical bonds, significantly improving the rutting resistance, high-temperature stability, and water damage resistance of asphalt. Compared with other modifiers, it is also more cost-effective, and is widely used in asphalt paving for highways and municipal roads, ensuring the durability of roads.

4. Metal and Surface Treatment Field:
On the one hand, electroplating-grade high-purity polyphosphoric acid can be used for surface treatment of metals such as steel and aluminum, forming a phosphate conversion film with strong corrosion resistance and good adhesion, laying the foundation for subsequent coating and electroplating of metals, and extending the life of metal products; on the other hand, it can also be used to treat titanium implants, helping to optimize the bone regeneration compatibility of related orthopedic implant devices.

5. Electronics and New Energy Fields:
In the electronics industry, high-purity products can be used for cleaning and etching of integrated circuits and liquid crystal panels, and can also clean semiconductor materials such as silicon wafers, removing surface impurities and oxides, ensuring the precision of electronic component manufacturing. In the new energy field, it is an important raw material for the synthesis of lithium hexafluorophosphate, a key material for new energy batteries, supporting the production of lithium batteries and other new energy storage devices.

6. Food Processing Auxiliary Field:
Its sodium salts, potassium salts, and other derivatives are often used as food additives. For example, sodium polyphosphate can be used as a moisture retention agent in meat products, keeping them tender and juicy; in baked goods, it can act as a leavening agent, resulting in a lighter texture, and it can also adjust the acidity of some foods and extend their shelf life.