Bulk Sodium Bentonite Clay For Sale
Bulk Sodium Bentonite Clay for Sale
Sodium bentonite is a naturally occurring clay formed from the alteration of volcanic ash, distinguished by its high sodium ion content which enables substantial water absorption and swelling.
Technical Specifications
Typical engineering parameters for bulk sodium bentonite include a specific gravity of 2.4–2.6, a pH range of 8.5–9.5 in aqueous suspension, and a moisture content below 10 % when dried. The swelling index, measured as the volume increase after hydration, commonly exceeds 15 mL/g, while the cation exchange capacity (CEC) ranges from 80 to 100 meq/100 g. Particle size distribution is usually controlled so that 80 % passes a 75 µm sieve, ensuring adequate suspension stability in fluid applications.
| Property | Typical Value |
|---|---|
| Specific Gravity | 2.4–2.6 |
| pH (10 % slurry) | 8.5–9.5 |
| Moisture Content | <10 % |
| Swelling Index | >15 mL/g |
| Cation Exchange Capacity (CEC) | 80–100 meq/100 g |
| Particle Size (‑75 µm) | ≥80 % |
Primary Industrial Applications
In drilling operations, the clay’s high swell and low fluid loss improve borehole stability and reduce formation damage, making it a preferred additive for water‑based muds. Foundries utilize sodium bentonite as a binder in green sand molds because its strong dry and hot strength prevents metal penetration while allowing easy shake‑out. For environmental containment, the clay’s low permeability when hydrated creates an effective barrier in landfill liners and pond seals, limiting contaminant migration. Additionally, its ability to absorb oils and greases supports its use in industrial spill cleanup and as a carrier for pesticide formulations.
- Drilling fluids – viscosity control, hole stabilization
- Foundry molding – green sand binder, high temperature resistance
- Environmental sealing – low permeability liners, pond barriers
- Industrial absorbents – oil spill containment, grease trapping
- Animal feed & litter – moisture absorption, odor control
Quality Control and Testing
Each batch is subjected to standardized tests per ASTM D6243 for swelling capacity, ASTM D4318 for liquid limit, and ISO 17892‑1 for particle size analysis. Incoming raw material is inspected for mineral purity using X‑ray diffraction, and moisture content is verified by loss‑on‑drying at 105 °C. Process controls include continuous monitoring of milling parameters to maintain consistent particle size distribution, ensuring that the final product meets the performance criteria required for demanding applications such as high‑pressure drilling.
Packaging and Shipping Options
Bulk sodium bentonite is commonly supplied in 1 000 kg super‑sacks equipped with lift‑loops and discharge spouts for efficient handling with forklifts or cranes. For larger volume shipments, the material can be loaded directly into pneumatic tankers or rail hoppers, minimizing packaging waste and reducing handling steps. All containers are lined with moisture‑resistant barriers to prevent premature hydration during transit.
- Super‑sack (1 000 kg) with polypropylene liner
- Bulk pneumatic tanker (minimum 20 t)
- Rail hopper car (up to 70 t)
- Containerized bulk bags (25 kg) for smaller lot orders
Frequently Asked Questions
Can the particle size be customized? Yes, milling adjustments can produce finer or coarser grades based on project specifications; consult technical sales for available ranges.
What information is required for a quotation? Required details include desired quantity, packaging preference, delivery destination, and any specific technical parameters such as target swelling index or CEC.
How is product consistency assured between batches? Each lot undergoes full testing per the QC protocol, and results are retained for traceability; statistical process control monitors key variables to limit variation.
What are the typical lead times for bulk orders? Lead times vary by destination and order size but generally range from 2 to 4 weeks for standard packaging; expedited options are available upon request.
Request a Quote