Dicalcium phosphate, also known as calcium hydrogen phosphate dihydrate or dibasic calcium phosphate, has the molecular formula CaHPO4. It is primarily used as a dietary supplement and as a source of calcium and phosphorus. The material is commonly available in hydrated form and can be converted to an anhydrous form by heating. It is insoluble in water and is used in food, animal feed, pharmaceutical, dental, and other applications.
Rock phosphate is a natural source of calcium phosphate in the form of tricalcium phosphate. Acidification with mineral acids produces phosphates and phosphoric acids. In the hydrochloric acid route, acidification of rock phosphate produces monocalcium phosphate in solution, while fluorides are removed as precipitates. The resulting supernatant is treated with lime to produce dicalcium phosphate, with calcium chloride formed as a by-product. Alternatively, purified phosphoric acid obtained from natural phosphates can be neutralized to produce dicalcium phosphate.
Animal-feed grade dicalcium phosphate is produced using wet-process phosphoric acid treated to reduce fluorine to an acceptable level. The proposed project is a Brown Field Project for installing dicalcium phosphate powder production facilities with an intended capacity of 600 MT/Year.
| Particulars | Value |
|---|---|
| Plant Capacity | 2 MT/Day |
| Land & Building (1450 sq.mt.) | Rs. 1.45 Cr |
| Plant & Machinery | Rs. 2.49 Cr |
| Working Capital for 1 Month | Rs. 26.85 Lac |
| Total Capital Investment | Rs. 4.46 Cr |
| Rate of Return | 18% |
| Break Even Point | 69% |
Dicalcium phosphate is a calcium and phosphorus compound commonly used as a dietary and mineral supplement. It is also known as calcium hydrogen phosphate or dibasic calcium phosphate and has the molecular formula CaHPO4. The material is commonly encountered in hydrated form and can be converted to an anhydrous form by heating. Because it provides both calcium and phosphorus, it has applications in animal feed, food products, pharmaceutical preparations, dietary supplements, and dental products. The report identifies dicalcium phosphate as the principal product considered for the proposed production facility.
Dicalcium phosphate is mainly used as a calcium and phosphorus source in food, animal feed, dietary supplements, and pharmaceutical products. The report also identifies its use in prepared breakfast cereals, dog treats, enriched flour, noodle products, poultry feed, and some toothpastes as a tartar-control agent. In pharmaceutical applications, it can function as a tableting agent. Heating the compound produces dicalcium diphosphate, which can be used as a polishing agent. These applications are supported by its mineral composition and functional properties.
Dicalcium phosphate can be manufactured by acidifying a calcium phosphate source and subsequently neutralizing the resulting phosphate solution. In the hydrochloric acid route described in the report, rock phosphate is acidified to produce monocalcium phosphate in solution, followed by treatment to remove fluorides as precipitates. The resulting supernatant is treated with lime to obtain dicalcium phosphate, while calcium chloride is formed as a by-product. Another route uses purified phosphoric acid obtained from natural phosphates, followed by neutralization to produce dicalcium phosphate.
The principal raw materials identified in the report include rock phosphate, hydrochloric acid, and hydrated lime or calcium hydroxide. The specific materials required depend on the selected manufacturing route and product grade. The process may also involve phosphoric acid, particularly where purified wet-process acid is used as the phosphate source. Raw-material quality is important because impurities, particularly fluorine in feed-grade production, can affect product suitability. The report therefore includes sections covering raw materials, their physical properties, chemical suppliers, and manufacturing process requirements.
Dicalcium phosphate is used across the animal feed, fertilizer, food and beverage, pharmaceutical, and cosmetics sectors. Animal feed is an important application because the compound supplies calcium and phosphorus needed for nutritional and bone-development requirements. Food and dietary products use it as a mineral source or additive, while pharmaceutical applications can use it in tablet formulations. The report also identifies toothpaste and agricultural fertilizer applications. Demand is influenced by developments in these end-use industries, together with dietary awareness, industrialization, and growth in food and pharmaceutical consumption.
A dicalcium phosphate plant requires appropriate controls for wastewater, waste generation, air emissions, chemical handling, and occupational safety. The report specifically addresses ETP and STP facilities, sewage and wastewater effluent, waste management, green-belt development, flue gas, HSE requirements, and environmental clearance. Where mineral acids and alkaline materials are handled, suitable storage, transfer, containment, personal protective equipment, process controls, and emergency arrangements are important. Detailed environmental and safety measures should be established according to the applicable site conditions, process design, product grade, and regulatory requirements.
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