Manufacturing method of tricalcium phosphate
I. INTRODUCTION
Tricalcium phosphate (TCP) is an important raw material for the production of chemicals and is widely used in the fields of food, medicine and agriculture. Due to its unique physical and chemical properties, the manufacturing method of tricalcium phosphate has attracted much attention. This article will introduce the manufacturing method of tricalcium phosphate in detail, including the reaction principle, process flow, equipment selection and other aspects.
II, reaction principle
The manufacture of tricalcium phosphate is mainly realized by chemical reaction, and its main reaction principle is as follows:
3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 6H2O
That is, calcium hydroxide (Ca(OH)2) reacts with phosphoric acid (H3PO4) under certain conditions to produce tricalcium phosphate (Ca3(PO4)2) and water (H2O) .
Three, process flow
The manufacturing process of tricalcium phosphate mainly includes the following steps:
1. batching: add calcium hydroxide and phosphoric acid to the reactor according to a certain proportion.
2. Reaction: heating and stirring in the reaction kettle, so that calcium hydroxide and phosphoric acid fully react to produce tricalcium phosphate.
3. Separation: Separate the reacted tricalcium phosphate from the remaining calcium hydroxide and phosphoric acid.
4. Washing: Wash the tricalcium phosphate with water to remove the impurities on the surface.
5. Drying: Dry the washed tricalcium phosphate to get the finished product.
Four, equipment selection
In the manufacturing process of tricalcium phosphate, the following equipment is needed:
1. reactor: used for dosing and reaction, need to have heating and stirring function.
2. Separation equipment: used to separate the generated tricalcium phosphate from the remaining calcium hydroxide and phosphoric acid, which can be filtered or centrifuged.
3. Washing equipment: used to wash the tricalcium phosphate, can be used by stirring or spraying and so on.
4. Drying equipment: used for drying the washed tricalcium phosphate, can adopt oven or airflow drying and so on.
5. Operation precautions
In the manufacturing process of tricalcium phosphate, the following operational matters need to be noted:
1. Control the proportion of ingredients to ensure that the reaction generates tricalcium phosphate.
2. Maintain a certain temperature and stirring speed during the reaction to ensure that the reaction is fully carried out.
3. When separating, make sure the tricalcium phosphate is completely separated from the remaining calcium hydroxide and phosphoric acid to avoid impurities mixing into the finished product.
4. When washing, control the temperature and flow rate of washing water to avoid excessive loss of tricalcium phosphate.
5. When drying, the temperature and wind speed should be controlled to avoid the lumping or deterioration of tricalcium phosphate.
6. Conclusion
Tricalcium phosphate as an important raw material for chemical production, its manufacturing method involves chemical reaction, process flow and equipment selection and other aspects. In the actual operation process, it is necessary to control the operating parameters and precautions of each link to ensure product quality and production safety.
