×
Bentonite is a clay rock mainly composed of montmorillonite. It has excellent expansibility, adsorption, thixotropy and suspension properties. It is widely used in metallurgy, casting, petroleum, chemical industry, building materials, food, environmental protection and other fields, known as the "universal clay".
1.Production process
（1）Natural Purification (Physical Processing)
Using natural bentonite ore as raw material, through mining → crushing → drying → grinding → sieving → purification (sodium/calcium modification) → testing → finished product. It can produce calcium-based and sodium-based bentonite with simple process and low cost, meeting general filling, adsorption and bonding needs.
（2）Modification and Activation Process
Through sodium treatment, acidification, organic modification, etc., to improve expansion ratio, ion exchange capacity and organic compatibility, used in high-end coatings, drilling fluids, medicine, cat litter and other fields.
2.Core Features
（1）High expansibility: expands several to ten times in water, with strong filling and sealing effect
（2）Strong adsorption: porous structure, adsorbs heavy metals, pigments, impurities and odors
（3）Thixotropy: gel at rest, fluid when stirred, friendly for coating and drilling fluid construction
（4）Suspension stability: prevents particle settling, improves system uniformity and stability
（5）Good bonding property: high forming strength, used in casting, pellets and building materials bonding
（6）Eco-friendly and non-toxic: no heavy metals, compliant with food contact, environmental and pet product standards
3.Application industries
（1）Casting and Metallurgy
Used as molding sand binder to improve strength and permeability, ensure casting precision; used as iron ore pellet binder to improve pelletizing rate and strength.
（2）Petroleum Drilling
Used to prepare drilling mud for wall protection, anti-collapse, cooling drill bits and carrying cuttings, a core material for drilling engineering.
（3）Building Materials and Environmental Protection
Used for waterproofing and plugging, mortar thickening, sewage treatment (adsorbing heavy metals/suspended solids), soil improvement.
（4）Coatings and Chemical Industry
Thickening, thixotropic, anti-settling, improving coating workability and storage stability.
（5）Food and Pharmaceutical
Food clarifier, anti-caking agent, pharmaceutical excipients, anti-diarrheal agent, compliant with food safety standards.
（6）Pet and Daily Chemicals
High-quality cat litter raw material, fast clumping, odor adsorption, dust-free and safe.
Procurement Guide
（1）Parameters: Montmorillonite content ≥60%–85%, expansion ratio ≥10–30, moisture ≤10%, fineness 200–325 mesh;
（2）Modification: Choose calcium-based, sodium-based or organic modified as needed;
（3）Testing: Verify expansion, adsorption, suspension and bonding performance by small-batch test;
（4）Qualifications: Comply with national standards; food-grade requires FDA/food safety certification.
