Bentonite Powder

Bentonite Powder is a natural clay rich in montmorillonite, characterized by its fine particle size predominantly below 2 microns. It appears as an off-white to cream powder that swells significantly when hydrated, forming a gel-like suspension. This swelling capacity and high cation exchange capacity (up to 100 meq/100g) are essential for its functional properties in industrial applications. Typically, the moisture content in standard grades is less than 15%, which influences handling and performance. The powder is supplied in dry form, facilitating storage and transport while requiring precautions to minimize moisture uptake. Buyers should consider that bentonite is insoluble in water but swells and maintains a pH range typically between 8 and 10 when suspended. Its use involves dosage rates specific to the application, such as 5-10% by weight for foundry sand binding or 2-5% in drilling fluids. Users should avoid mixing bentonite with strong acids or oxidizers that can degrade the clay structure.

In drilling operations, bentonite powder stabilizes boreholes by increasing the viscosity and suspension of drilling fluids, preventing collapse and ensuring bore integrity. This stability is critical to avoid costly delays and equipment damage during extraction or construction projects. In civil engineering, the material’s low permeability and swelling properties enable effective sealing of water bodies and containment sites, mitigating leakage risks. These industrial benefits contribute directly to operational efficiency and environmental protection in manufacturing and construction processes.