Sodium tripolyphosphate (STPP), also known as pentasodium phosphate, pentasodium tripolyphosphate, etc., is an amorphous water-soluble linear polyphosphate. Sodium tripolyphosphate has the chemical formula Na5P3O10 and is mostly a white powder. After years of development, the preparation process of sodium tripolyphosphate has been mature, which can be roughly divided into wet and heat combination, wet phosphoric acid method, hot phosphoric acid method and so on. Among them, the thermal phosphoric acid process has become the mainstream method for the production of sodium tripolyphosphate by virtue of its advantages of low impurity content, mature technology and high production efficiency.

The upstream of sodium tripolyphosphate is mainly the raw material industry and the production equipment industry. Among them, the raw materials of sodium tripolyphosphate mainly include phosphoric acid, soda ash, sodium dihydrogen phosphate, etc., and the production equipment of sodium tripolyphosphate mainly includes reaction kettle, polymerization furnace, dryer, filter and so on.

According to the different application fields, sodium tripolyphosphate can be divided into food grade, industrial grade, pharmaceutical grade and so on. Sodium tripolyphosphate has emulsification, chelation and other functions, and is mostly used in the production of food additives, water softeners, synthetic detergents, dispersants and so on. Among them, synthetic detergent is the largest application field of sodium tripolyphosphate, accounting for 40.23%; Followed by food additives, the application accounted for 10.16%.

Synthetic detergent has excellent decontamination ability and cleaning ability, can remove all kinds of stains, and plays a very important role in laundry, dishwashing and other cleaning aspects, and has become one of the essential products in the family. With the rapid development of China's economy and society, the quality of life of residents has gradually improved, and the requirements for synthetic detergents have gradually increased. In order to meet the diversified needs of consumers, the quality of synthetic detergents has gradually improved, and the variety of products has been increasing. At present, China's synthetic detergent production capacity continues to expand, the output has increased. In 2023, the production of synthetic detergent in China has exceeded 110.00 million tons. Sodium tripolyphosphate is one of the important raw materials for the production of synthetic detergent, and the market demand is increasing gradually.