[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of calcium dihydrogen phosphate, the role and harm of calcium dihydrogen phosphate

Properties of calcium dihydrogen phosphate

calcium dihydrogen phosphate (Monocalcium Phosphate, MCP), the chemical formula Ca(H₂ POO₂), is a white crystal or crystalline powder that is easily soluble in water and slightly soluble in alcohol. It has a molecular weight of 234.05g/mol and a melting point of about 190°C. MCP exhibits acidity in aqueous solution with a pH between 4.0 and 5.0. This substance is stable in dry air, but deliquescent in moist air. Due to its high water solubility and good bioavailability, MCP has important application value in many fields.

Use of calcium dihydrogen phosphate

calcium dihydrogen phosphate is widely used in food, feed, fertilizer, medicine and other fields. In the food industry, it is mainly used as bread leavening agent, flavoring agent and nutritional fortifier to enhance the nutritional value of food and improve the taste. In the feed industry, MCP is an important phosphorus and calcium nutritional supplement for poultry and livestock, and promotes the growth and development of animal bones and teeth. In agriculture, calcium dihydrogen phosphate is an important component of high-efficiency phosphate fertilizer, which helps crop growth and improves crop yield and quality. MCP is also used in the pharmaceutical industry as a calcium supplement and buffer to help treat calcium deficiency and acid-base disorders.

Upstream raw material of calcium dihydrogen phosphate

the production of monobasic calcium phosphate mainly depends on several key upstream raw materials, including phosphate rock, sulfuric acid and limestone. Phosphate rock is the main source of the preparation of phosphoric acid, which is generated by the reaction of phosphate rock and sulfuric acid. The phosphoric acid then reacts with limestone (calcium carbonate) to produce calcium dihydrogen phosphate and by-products. The reaction process is as follows: [ \text {phosphate rock + sulfuric acid} \rightarrow \text {phosphoric acid}] [ \text {phosphoric acid + calcium carbonate} \rightarrow \text {calcium dihydrogen phosphate + carbon dioxide}]

downstream applications of calcium dihydrogen phosphate

as an important industrial raw material, the downstream application of calcium dihydrogen phosphate covers many industries. In the food industry, MCPs are used in baked goods and dairy products to improve texture and taste. In the feed industry, MCP is an important additive in livestock feed, providing the necessary calcium and phosphorus elements to promote animal growth. In the field of agriculture, calcium dihydrogen phosphate is the main component of high-efficiency phosphate fertilizer, which promotes crop growth and increases yield. In the pharmaceutical field, MCP is widely used in the production of health products and pharmaceuticals as a calcium supplement and buffer.

Storage Method of Calcium Dihydrogen Phosphate

because calcium dihydrogen phosphate is hygroscopic and acidic, it requires special attention during storage. MCPs should be stored in a dry, cool, well-ventilated environment, away from moisture and high temperatures to prevent clumping and degradation. Use moisture-proof packaging, such as plastic bags or sealed containers, to prevent contact with moisture in the air. Keep away from strong alkaline substances to prevent chemical reactions. The temperature in the storage environment should be controlled between 10-30 ℃, and the relative humidity should be lower than 60%.

Production process of calcium dihydrogen phosphate

the production process of calcium dihydrogen phosphate is relatively simple, but the reaction conditions need to be strictly controlled to ensure product quality. Generally, the wet process is adopted, that is, the phosphate rock is first treated with sulfuric acid to generate phosphoric acid, and then reacted with limestone to generate MCP. The specific steps are as follows:

1. phosphate rock acidolysis: Mix phosphate rock with sulfuric acid and heat it to an appropriate temperature to fully react to generate phosphoric acid.
2. Purified phosphoric acid: Remove impurities in phosphoric acid through filtration and sedimentation to obtain high-purity phosphoric acid.
3. Reaction to produce MCP: Mix the purified phosphoric acid with limestone and react under appropriate temperature and stirring conditions to generate calcium dihydrogen phosphate.
4. Drying and packaging: The resulting MCP is dried to remove moisture and finally packaged into a product.

Market Prospect of Calcium Dihydrogen Phosphate

as an important chemical product, the market demand of calcium dihydrogen phosphate is stable and has growth potential. With the increase of global population and the development of agriculture, food, feed and other industries, the demand for MCP will continue to grow. Especially in developing countries, the acceleration of agricultural modernization and the increase in demand for phosphate fertilizers will promote the development of the MCP market. Increased awareness of food safety and fortification will also promote the use of MCP in the food and feed industry. The strengthening of environmental protection policies has prompted enterprises to adopt more environmentally friendly production processes and further enhanced the market competitiveness of MCP.

Environmental Protection and Safety of Calcium Dihydrogen Phosphate

in the process of production and use of calcium dihydrogen phosphate, environmental protection and safety issues need to be paid attention. The waste water and waste gas generated in the production process need to be treated to meet environmental protection standards and prevent environmental pollution. During use, care should be taken to avoid direct contact with skin and eyes to prevent irritation and injury. In the process of transportation and storage, it is necessary to ensure safe operation and prevent accidents in accordance with the management regulations of hazardous chemicals.

Summary

as a kind of chemical product with wide application value, the production, storage and application of calcium dihydrogen phosphate need scientific and reasonable management. By optimizing the production process, strictly controlling quality, ensuring environmental protection and safety, the market competitiveness of MCP can be further improved to meet the needs of various industries for high-quality calcium dihydrogen phosphate. In the future, with the progress of technology and the increase of market demand, the application prospect of calcium dihydrogen phosphate will be broader.