Polyphosphoric acid (PPA) has a wide range of applications. my country has gradually become the world’s major producer and exporter.

polyphosphoric acid (ppa), also known as tetrapolyphosphoric acid and polyphosphoric acid, is an inorganic substance with the chemical formula hn+2pno3n+1. it appears as a colorless, transparent and viscous liquid, and can be miscible with water and hydrolyzed into orthophosphoric acid. , does not crystallize. polyphosphoric acid has the characteristics of good stability, strong water-based, low…