Bentonite

Molecular Formula: (Na,Ca) 0.33 (AI,Mg,Fe)₂[(Si,AI)₄O₁₀(OH)₂.nH₂O

 Bentonite is a clay mineral with turf ace as its main composition; it has hydroscopicity, dilatability, caption exchange, adsorptive, wetting and discoloring properties; widely used in drilling mud, sand binder, discoloring of vegetable/animal oils, purificant, rubber, plastic fillers, dryers, sorbents, detergents, mineral feed additives etc. 

Physical Property

Item

Calcic soil

Sodium soil

Granularity(meshes)

100-300

100-300

Pass rate( % )

>95

>95

PH value

7.60

10

Oil absorption( mg/100g )

99.55

Turf ace( % )

67

67

Discoloring power

11.38

Colloid index( m1/15g )

50

100

Expansively( m1/g )

5.8

70

Green compression strength( kg/cm)

0.43

0.90

Dry compression strength ( kg/cm )

4.0

8.0

Refract ability

1450

Mud yield rate

>10

>14