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[Chemical Knowledge]：What are the upstream raw materials of yellow phosphorus? What do the downstream products contain?

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Yellow phosphorus plays an important role in the field of raw materials for chemical production, and its upstream and downstream related products are extensive. This article will detail the upstream and downstream related products of yellow phosphorus, including upstream raw materials, downstream products and production processes.

1. upstream raw materials

yellow phosphorus upstream raw materials are mainly phosphate rock and coke. Phosphate rock is an ore containing phosphorus, the main component is calcium phosphate, used in the production of yellow phosphorus, phosphate fertilizer and other chemical products. Coke is a solid residue obtained by high temperature dry distillation of coal, which is mainly used as fuel and reducing agent. In the production of yellow phosphorus, coke not only provides heat, but also participates in the reaction as a reducing agent.

2. yellow phosphorus production

yellow phosphorus production mainly uses the electric furnace method, the phosphate rock and coke are mixed in a certain proportion and then added to the electric furnace, at high temperature through arc heating and reduction reaction, the generation of yellow phosphorus and slag. The production of yellow phosphorus consumes a large amount of electricity and coke, so energy costs account for a large proportion of production costs.

3. downstream products

yellow phosphorus downstream related products are very extensive, including thermal phosphoric acid, sodium tripolyphosphate, calcium hydrogen phosphate, phosphorus chemical products.

1. thermal phosphoric acid

thermal phosphoric acid is one of the main downstream products of yellow phosphorus, which is used to produce phosphate fertilizer, phosphate, etc. There are two main production processes for thermal phosphoric acid: wet-process phosphoric acid and dry-process phosphoric acid. Among them, wet-process phosphoric acid is prepared by reacting yellow phosphorus with sulfuric acid, and dry-process phosphoric acid is prepared by reacting yellow phosphorus with oxygen.

2. sodium tripolyphosphate

sodium tripolyphosphate is an important food additive, used to improve the water retention and taste of food. The production of sodium tripolyphosphate is mainly based on yellow phosphorus as raw material, through oxidation, polymerization and other processes.

3. Calcium hydrogen phosphate

Calcium hydrogen phosphate is a commonly used feed additive used to improve animal growth performance and bone development. The production of calcium hydrogen phosphate is mainly based on yellow phosphorus and lime as raw materials, through reaction, precipitation and other processes.

4. phosphorus chemical products

yellow phosphorus can also be used to produce a variety of phosphorus chemical products, such as phosphate, ammonium phosphate, potassium dihydrogen phosphate and so on. These products are widely used in pesticides, food additives, detergents and other fields.

4. production process optimization and development trend

With the progress of science and technology and the improvement of environmental protection requirements, the production process of yellow phosphorus is continuously optimized, and the development trend is developing in the direction of energy saving, environmental protection and high efficiency. On the one hand, researchers are exploring new production processes to reduce energy consumption and environmental pollution; on the other hand, through the transformation and upgrading of existing equipment, improve production efficiency and product quality.

In short, yellow phosphorus has an important position in the field of raw materials for chemical production, and its upstream and downstream related products are extensive. With the progress of science and technology and the improvement of environmental protection requirements, the production process of yellow phosphorus will be continuously optimized to make greater contributions to the development of the chemical industry.

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