BENTONITE POWDER
Bentonite is an absorbent aluminium phyllosilicate clay consisting mostly of montmorillonite.
The different types of bentonite are each named after the respective dominant element, such as potassium(K), sodium (Na), calcium(Ca), and aluminium (Al). Experts debate a number of nomenclatorial problems with the classification of bentonite clays. Bentonite usually forms from weathering of volcanic ash most often in the presence of water. However, the term bentonite, as well as a similar clay called tonstein, has been used to describe clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium and calcium bentonite. In stratigraphy and tephrochronology, completely devitrified(weathered volcanic glass) ash-fall beds are commonly referred to as K-bentonites when the dominant clay species is illite. Other common clay species that are sometimes dominant are montmorillonite and Kaolinite. Kaolinite-dominated clays are commonly referred to as tonsteins and are typically associated with coal.
The different types of bentonite are each named after the respective dominant element, such as potassium(K), sodium (Na), calcium(Ca), and aluminium (Al). Experts debate a number of nomenclatorial problems with the classification of bentonite clays. Bentonite usually forms from weathering of volcanic ash most often in the presence of water. However, the term bentonite, as well as a similar clay called tonstein, has been used to describe clay beds of uncertain origin. For industrial purposes, two main classes of bentonite exist: sodium and calcium bentonite. In stratigraphy and tephrochronology, completely devitrified(weathered volcanic glass) ash-fall beds are commonly referred to as K-bentonites when the dominant clay species is illite. Other common clay species that are sometimes dominant are montmorillonite and Kaolinite. Kaolinite-dominated clays are commonly referred to as tonsteins and are typically associated with coal.
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Specifications of O.C.M.A. grade / A.P.I.- 13 A ( Section 6 ) grade Bentonite powder.
1) Moisture 12.0% max. 2) Viscometer Reading 30.0 min. (600 r.p.m.) 3) Grit 2.5% max. 4) Filtrate 16.0 max. 5) PV-YP Ratio 6.0 max. 6) Sieve Analysis 98 % min. (Pass through 100 mesh sieve.) (Above results are taken after preparing 6.43% slurry of Bentonite powder with Distilled water (i.e. 22.5 grm Bentonite/350 ml D.water.) Note: Although we take enough care to maintain our quality standards as per guidelines of ISO 9001:2000, but here one should always keep in mind that Bentonite is a mineral found naturally & hence minor variations may tend to occur sometimes. FOUNDRY GRADE BENTONITE Specification RESULT 1.Wet tensile strength (WTS) : 0.2.5-0.3/cm2 2. Green Compressive Strength (GCS) : 8.5 - 11 N/cm2 3. pH value : 9 – 11 4. Free swelling value : 27– 30ml 5. Methylene Blue Value : 400 min gm/g 6. Moisture content : 13% 7. Particle size : 85%Passing 200 mesh 8.Gelling time INSTANT 9. MONTMORONITE 80% SPECIFICATIONS OF CALCIUM BENTONITE 1) Al2O3......................................16.4% 2) Si2O3.......................................45.0% 3) Fe2O3........................................5.6% 4) CaO..........................................1.18% 5) MgO.........................................2.43% 6) K2O...........................................0.13% 7) NaO...........................................8.10% 8) TiO2..........................................1.16% 9) LOI..........................................13.28% SPECIFICATION OF COSMETIC GRADE BENTONITE POWDER SPECIFICATION PARAMETER 1 COLOUR CREAMY WHITE 2 FINENESS 200MASH 95% PASSING 3 MOISTURE 4.5 TO 6.5% 4 SPECIFIC GRAVITY 1.7G/ML 5 BULK DENSITY 0.700 TO 0.900 6 PH 7 TO 10 SPECIFICATION OF IOP GRADE BENTONITE
NO. PARAMETERS SPECIFICATION CHEMICAL COMPOSITION 1 SiO2 % 52max. 2 Fe2O3 % 12min. 3 AL2O3 % 16max. 4 CaO% 0.5-1 5 Na2O% 2.0-2.5 6 MgO% 3.0max. PHYSICAL COMPOSITION 1 Moisture % ( ARB) 14.00 max. 2 PH 8.5 -10 3 Free Swelling Velum 28-30 4 Methylene Blue Absorption (MBA) mg/g. 400MIN. 5 Plate Water Absorption (PWA) % 600min. SEA WATER RESISTANCE BENTONITE
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Specifications of SPECTA BOND GRADE of Sodium Based Bentonite Powder
Sr.No Physical properties Specta Bond Grade
1 Sieve analysis
<100 mesh Min 99%
<200 mesh Min 85%
2 Moisture at 105-110deg c 9-12%
3 Base exchange capacity(meq/100gm) Min 100
4 Swelling Capacity. (2gm/100cc) 23-27
5 Gelling time(10%) 45 Sec.
6 ph—2%suspension 8.0-9.0
7 Methylene blue value
( mg/gm of sample) 390
8 Montmorillonite >75%
9 Green compressive strength
(B:W=10:4) Min.10psi
10 Gel formation index Min55
11 Liquid Limit 500
12 Swelling Index >30
NOTE: -This mineral (Raw Bentonite) is excavated from mines.
It is in clay form and mostly composed of the mineral “MONTMORILLONITE”
Mixed with some related minerals like BEIDELLITE.