⁠Bentonite – Apex International

⁠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.

How We Serve Bentonite

Product	Bentonite
Packing	1.4 tons jumbo bags, 50/40kg bags as per client required
Monthly capacity	10,000 tons
Shipping mode	Containerized or Bulk

Properties	Protocol	Unit	Result
Free Swelling Volume 2 gm/100ml	ASTM D 5890:1995	ml	28 – 30
Methylene Blue Absorption Value	API spe 131:2004/ ISO 10416:2002	mg/gm of clay	350-400
Liquid Limit	IS:12446-1988	ml/100 gm	550 – 650
Gel Time 2.5gm/25 ml	IS:12446-1988	second	Instant.
Gelling Index	IS:12446-1988	ml	75 – 85
Moisture Content % by weight	API Spec. 13A:2004/ ISO 13500: 1998	%	10.0 – 12.0
PH Value 2% slurry	IS:6186-1986	pH	9.5 – 9.9
Green Compression Strength Bentonite : Water :10:4 55-60 A.F.S Sand	IS:1918-1966	psi	12
Wet Tensile Strength	IS:12446-1988	N/cm2	0.16-0.18
Dry Mesh % Passing 200 B.S.S	IS:6186-1986	%	85 Minimum
Swelling Index	IS:6186-1986	10ml/gm	24-28

Drilling Grade

Properties	Protocol	Unit	REQUIRED	RESULT
Viscometer Dial Reading at 600 rpm	API Spec. 13A:2004/ ISO 13500: 1998	r/min	30	35-40
Yield Point / Plastic Viscosity Ratio	API Spec. 13A:2004/ ISO 13500: 1998	–	3 Max	2.5
Filterate Volume	API Spec. 13A:2004/ ISO 13500: 1998	ML	15 Max	14
Moisture Content	API Spec. 13A:2004/ ISO 13500: 1998	% by weight	10.0 max.	10
Dry Screen Analysis(Residue Greater than 75 Microns)%	API Spec. 13A:2004/ ISO 13500: 1998	% by weight	4.0 max.	3.0 – 4.0

OCMA Grade

PROPERTIES	PROTOCOL	UNIT	REQUIRED
Yield	OCMA DFCP-4	bbls/2000lbs	90 min
A.P.I. Filterate Loss	OCMA DFCP-4	ml	15.0 max.
Moisture Content	API Spec. 13A:2004/ ISO 13500: 1998	% by weight	15.0 max.
Dry Screen Analysis 100 Mesh Sieve	OCMA DFCP-4	% by weight	98.0 min.
Wet Screen Analysis 200 Mesh Sieve residue	OCMA DFCP-4	% by weight	2.5 max

Piling Grade Bentonite Powder

Properties	Protocol	Unit	Result
Liquid Limit	IS:12446-1988	ml/100 gm	400 – 450
Moisture Content	API Spec. 13A:2004/ ISO 13500: 1998	% by wt.	12.0 Max
Dry Screen Analysis (residue on 75 um sieve	IS:6186-1986	% by. Wt.	10.0 max.
Free Swelling Volume 2gm/100ml	ASTM D 5890:1995	ml	30 – 35
PH Value of 5% gel	IS:6186-1986	pH	9.5 – 10.0
Loose Bulk Density	IS:7589-1974	gm/ml	0.85 – 1.0
Gel Time 2.5gm/25 ml	IS:12446-1988	second	Instant
Filterate Volume	API Spec. 13A:2004/ ISO 13500: 1998	ml	20 max
Viscosty at 600 rpm	API Spec. 13A:2004/ ISO 13500: 1998		30 min
Methylene Blue Value	API spe 131:2004/ ISO 10416:2002	mg/gm of clay	350 – 400

Checkout ⁠Bentonite

Powder

Lumps

Industry We Serve

Apex International

Powder

Lumps

Quick Links

Our Products

Contact Us