⁠Bentonite
About ⁠Bentonite
Bentonite is a high-performance industrial clay mineral valued for its high swelling capacity, strong binding properties, superior absorbency, and excellent rheological behavior. Apex International manufactures and exports export-grade bentonite from India, processed to deliver consistent water absorption, viscosity control, and bonding strength for global markets.
Bentonite is widely used across foundry, oil & gas drilling, civil engineering, iron ore pelletization, and absorbent applications acting as a binder in foundry moulding sand for high green strength and reduced casting defects, a viscosity and filtration control agent in drilling fluids for borehole stability, and a sealing material in geotechnical works such as slurry walls, piling, tunnelling, and waterproofing.
It also plays a critical role in iron ore pellet manufacturing by improving pellet strength and minimizing material loss, and in cat litter and absorbents for superior liquid absorption and odour control. These functional advantages make bentonite an essential industrial mineral for efficient, reliable, and large-scale industrial and infrastructure operations worldwide.
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How We Serve Bentonite
ProductBentonite
Packing1.4 tons jumbo bags, 50/40kg bags as per client required
Monthly capacity10,000 tons
Shipping modeContainerized or Bulk
PropertiesProtocolUnitResult
Free Swelling Volume 2 gm/100mlASTM D 5890:1995ml28 – 30
Methylene Blue Absorption ValueAPI spe 131:2004/ ISO 10416:2002mg/gm of clay350-400
Liquid LimitIS:12446-1988ml/100 gm550 – 650
Gel Time 2.5gm/25 mlIS:12446-1988secondInstant.
Gelling IndexIS:12446-1988ml75 – 85
Moisture Content % by weightAPI Spec. 13A:2004/ ISO 13500: 1998%10.0 – 12.0
PH Value 2% slurryIS:6186-1986pH9.5 – 9.9
Green Compression Strength Bentonite : Water :10:4 55-60 A.F.S SandIS:1918-1966psi12
Wet Tensile StrengthIS:12446-1988N/cm20.16-0.18
Dry Mesh % Passing 200 B.S.SIS:6186-1986%85 Minimum
Swelling IndexIS:6186-198610ml/gm24-28
Drilling Grade
PropertiesProtocolUnitREQUIREDRESULT
Viscometer Dial Reading at 600 rpmAPI Spec. 13A:2004/ ISO 13500: 1998r/min3035-40
Yield Point / Plastic Viscosity RatioAPI Spec. 13A:2004/ ISO 13500: 1998–3 Max2.5
Filterate VolumeAPI Spec. 13A:2004/ ISO 13500: 1998ML15 Max14
Moisture ContentAPI Spec. 13A:2004/ ISO 13500: 1998% by weight10.0 max.10
Dry Screen Analysis(Residue Greater than 75 Microns)%API Spec. 13A:2004/ ISO 13500: 1998% by weight4.0 max.3.0 – 4.0
OCMA Grade
PROPERTIESPROTOCOLUNITREQUIRED
YieldOCMA DFCP-4bbls/2000lbs90 min
A.P.I. Filterate LossOCMA DFCP-4ml15.0 max.
Moisture ContentAPI Spec. 13A:2004/ ISO 13500: 1998% by weight15.0 max.
Dry Screen Analysis 100 Mesh SieveOCMA DFCP-4% by weight98.0 min.
Wet Screen Analysis 200 Mesh Sieve residueOCMA DFCP-4% by weight2.5 max
Piling Grade Bentonite Powder
PropertiesProtocolUnitResult
Liquid LimitIS:12446-1988ml/100 gm400 – 450
Moisture ContentAPI Spec. 13A:2004/ ISO 13500: 1998% by wt.12.0 Max
Dry Screen Analysis (residue on 75 um sieveIS:6186-1986% by. Wt.10.0 max.
Free Swelling Volume 2gm/100mlASTM D 5890:1995ml30 – 35
PH Value of 5% gelIS:6186-1986pH9.5 – 10.0
Loose Bulk DensityIS:7589-1974gm/ml0.85 – 1.0
Gel Time 2.5gm/25 mlIS:12446-1988secondInstant
Filterate VolumeAPI Spec. 13A:2004/ ISO 13500: 1998ml20 max
Viscosty at 600 rpmAPI Spec. 13A:2004/ ISO 13500: 199830 min
Methylene Blue ValueAPI spe 131:2004/ ISO 10416:2002mg/gm of clay350 – 400
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