Sodium perborate drying

Sodium perborate, a chemical compound with the formula NaBO₃·nH₂O (commonly existing as tetrahydrate NaBO₃·4H₂O or monohydrate NaBO₃·H₂O), is a versatile oxidizing agent widely used in detergents, bleaching agents, and disinfectants. Common methods include: Flash Dryer .

Sodium perborate, a chemical compound with the formula NaBO₃·nH₂O (commonly existing as tetrahydrate NaBO₃·4H₂O or monohydrate NaBO₃·H₂O), is a versatile oxidizing agent widely used in detergents, bleaching agents, and disinfectants. Drying sodium perborate is a crucial step in its production to stabilize its active oxygen content, ensure shelf life, and optimize performance in end-use applications.

Drying Process Overview
Sodium perborate is inherently hygroscopic and contains bound water molecules. The drying process focuses on carefully removing excess or free moisture while preserving its crystalline structure and oxidizing capacity. Common methods include:

Flash Dryer :
High-Efficiency Drying Mechanism: XSG Series Spin Flash Dryer employs a tangential air inlet and a high-speed stirrer to create a powerful rotating wind field. This ensures efficient heat transfer and uniform drying of paste, cake, and slurry materials.
Advanced Material Processing: The equipment processes raw materials through a combination of cutting, shearing, blowing, floating, and rotating actions, transforming them into granulated form. This enhances material separation and strengthens the heating exchange process.

Key Considerations

Temperature Sensitivity: Sodium perborate decomposes at elevated temperatures (above 60°C), releasing oxygen and reducing its active oxygen content. Drying temperatures are typically maintained below 50°C to preserve stability.

Moisture Control: Residual moisture must be reduced to <0.5% to prevent caking, hydrolysis, or premature loss of oxidizing power during storage.

Crystalline Integrity: Maintaining the monohydrate or tetrahydrate structure is critical for solubility and reactivity in applications like laundry detergents.

Safety Measures: As a strong oxidizer, sodium perborate dust requires explosion-proof equipment and controlled environments to mitigate fire risks.

Applications of Dried Sodium Perborate
Properly dried sodium perborate is essential in:

Household Detergents: Acts as a bleach activator in powdered and tablet detergents.

Disinfectants: Utilized for its antimicrobial properties in cleaning products.

Textile and Paper Industries: Serves as a mild bleaching agent for fabrics and pulp.

Conclusion
The drying of sodium perborate demands precision to balance moisture removal, thermal stability, and structural integrity. By employing controlled methods and stringent safety protocols, manufacturers ensure a high-quality product that meets industrial and consumer needs for effective oxidation and bleaching performance.