Quick Details
- Processing Time:10 days
- Port:Abu Dabi
- Supply Ability: 5000 Tons Per Month
- Brand Name:Coliar
Bentonite is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite. Na-montmorillonite has a
considerably greater swelling capacity than Ca-montmorillonite. Bentonite usually forms from the weathering of volcanic ash in seawater, or by hydrothermal circulation through the porosity of
volcanic ash beds,[3][4] which converts (devitrification) the volcanic glass (obsidian, rhyolite, dacite) present in the ash into clay minerals. In the mineral alteration process, a large
fraction (up to 40-50 wt.%) of amorphous silica is dissolved and leached away, leaving the bentonite deposit in place.[citation needed] Bentonite beds are white or pale blue or green (traces of
reduced Fe2+) in fresh exposures, turning to a cream color and then yellow, red, or brown (traces of oxidized Fe3+) as the exposure is weathered further.[5]
