The principle of extraction tank extraction

**Extraction Tank Overview**

Extraction tanks are versatile devices used in industries such as Traditional Chinese Medicine, food, and chemicals for processes like boiling, extraction, alcohol recovery, and volatile oil separation. These tanks operate on the principle of leaching, involving two mass transfer methods: molecular diffusion and convection diffusion.

### **Multifunctional Extraction Tank**

1. **Extraction Process**

- The extraction of active ingredients from medicinal materials involves solvents and specific methods.

- The process includes three stages:

- **Infiltration and Penetration:** Solvent soaks into the material, penetrating plant tissues and cells.

- **Desorption and Dissolution:** Solvent dissolves active ingredients, freeing them from tissues or cells.

- **Diffusion and Solvent Exchange:** Concentration differences drive active ingredients out of tissues or cells.

2. **Mass Transfer Modes**

- **Molecular Diffusion:** Movement of molecules from high to low concentration.

- **Convection Diffusion:** Movement of solvent and solute due to flow.

### **Factors Affecting Extraction**

- Material size

- Extraction solvent

- Extraction time

- Temperature

- Concentration gradient

- Output pressure

- pH

- Fluid turbulence

The extraction tank's efficiency relies on maintaining a strong concentration gradient, as its absence halts the extraction process.