Phosphorus is an important basic industrial raw material, mainly used in various fields such as chemical engineering and pesticides.

    Yellow phosphorus is a colorless waxy crystal with a garlic like odor. English name: Phosphorus,yellow， Molecular formula P4. Molecular weight 124.08. Relative density 1.82 (20 ℃). The melting point is 44.1 ℃. Boiling point 280 ℃. The relative density of vapor is 4.3. Insoluble in water, easily soluble in organic solvents such as fat and carbon disulfide. At room temperature, it can spontaneously ignite in air and easily oxidize into phosphorus trioxide and phosphorus pentoxide, so it is often stored in water. Yellow phosphorus vapor can be oxidized to hypophosphorous acid and phosphoric acid when exposed to humid air. Visible light green fluorescence in the dark. At present, China's total output ranks first in the world, with hundreds of yellow phosphorus production plants. The production facilities are mainly distributed in four provinces: Yunnan, Guizhou, Sichuan, and Hunan. The yellow phosphorus production capacity of Yunnan, Guizhou, and Sichuan provinces exceeds 80% of the national total. Due to the production of yellow phosphorus consuming a large amount of energy and having a significant impact on the surrounding environment, it belongs to a high energy consumption and high pollution industry. The production process of yellow phosphorus is relatively simple. Phosphate ore, silica, and coke are placed in an electric furnace in a certain proportion and particle size, and undergo decomposition and reduction reactions at a high temperature of over 1000 degrees. Phosphorus vapor and furnace dust are cooled and rinsed together to obtain the product, while high-temperature slag is directly discharged from the electric furnace. Yellow phosphorus is mainly used as a raw material for the production of red phosphorus, phosphoric acid, and phosphorus compounds, and is also used as a pesticide, rodenticide, and so on. Vigorously developing fine phosphate products using yellow phosphorus as raw material: The phosphate industry is a fiercely competitive industry, and whoever wins the market wins the initiative. Phosphates are a variety of products with multiple uses, and new applications can be continuously developed in practice. If some products are classified into feed grade, food grade, and electronic grade according to the amount of impurities, the efficiency can be greatly improved with the improvement of product grade, and some may even double. Phosphate products belong to the category of fine chemicals, and their production technology is highly confidential. Although China has made some achievements in this area, there is still a big gap compared to foreign countries, and there are still many products to be developed and many fields are blank. In the future, efforts should be made in the development of refined and deep phosphate product technology, and the technology for high value-added products should be developed. In foreign refined yellow phosphorus products, the yellow phosphorus produced by refining yellow phosphorus with phosphine is mainly used in the electronics industry, and its sales price is ten times the current market price of yellow phosphorus in China. The development of fine phosphorus chemical industry in China is relatively backward, with few product varieties, incomplete quality specifications, and relatively low standards. It is weak in variety selection, technology development, and application research. There is a lack of different specifications of products for different industries and purposes, such as electronic information, aerospace, precision machinery, daily chemical industry, petrochemical industry, environmentally friendly coatings, and functional materials.