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[Chemical Knowledge]：Properties and Uses of Dilute Phosphoric Acid

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dilute phosphoric acid in the chemical production of raw materials in the field of properties and uses
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1. the nature of dilute phosphoric acid

dilute phosphoric acid is a colorless transparent, corrosive liquid, chemical H3PO4. It is a tribasic acid with strong acidity and can be completely ionized in water. Dilute phosphoric acid has some unique properties, so it has a wide range of applications in the field of chemical production raw materials.

1. Acidity: Dilute phosphoric acid has strong acidity, and its pH value is generally between 2 and 3, so it can be used as an acidic catalyst, pickling agent, etc.

2. corrosion: dilute phosphoric acid on metal, glass, ceramics and other materials have a certain corrosive, so in the storage and use of the need to choose the right material.

3. Stability: Dilute phosphoric acid is stable at room temperature and is not easy to decompose, so it has high safety during storage and transportation.

2. the use of dilute phosphoric acid

dilute phosphoric acid has a wide range of applications in the field of chemical production raw materials, the following is its main use:

1. food additives: dilute phosphoric acid can be used as food additives, used to regulate the acidity and taste of food, as well as to prevent food spoilage.

2. chemical raw materials: dilute phosphoric acid can be used to produce a variety of phosphate chemical products, such as phosphate fertilizer, phosphate, phosphate and so on.

3. Metal surface treatment: Dilute phosphoric acid can be used for cleaning and phosphating of metal surfaces to improve the corrosion resistance and adhesion of metal surfaces.

4. Pharmaceutical intermediates: Dilute phosphoric acid can be used as a pharmaceutical intermediate for the production of some drugs and health products.

3. dilute phosphoric acid production process

dilute phosphoric acid production process mainly has two kinds: wet method and thermal method. The wet process is to react phosphate rock with sulfuric acid to generate phosphoric acid and calcium sulfate, and then obtain dilute phosphoric acid through filtration, concentration and other processes. The thermal process is to mix phosphate rock, coke and quartz sand at high temperature for electrolysis to generate phosphorus gas and hydrogen, and the phosphorus gas reacts with water to generate phosphoric acid.

4. market prospect of dilute phosphoric acid

With the continuous development of science and technology, dilute phosphoric acid is more and more widely used in the field of chemical production raw materials, and the market demand is also increasing. At the same time, with the improvement of environmental awareness and the promotion of green chemical industry, the production process of dilute phosphoric acid is also constantly improved and optimized, making its production cost continuously reduced and its market competitiveness continuously improved. Therefore, the market prospect of dilute phosphoric acid is very broad.

In short, dilute phosphoric acid, as an important raw material for chemical production, has a wide range of uses and broad market prospects. In the future development, we need to continue to strengthen the research on its nature and application, and constantly improve its production process and technical level to meet the needs of the market and promote the green development of the chemical industry.

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