
Bentonite is a type of clay that is primarily composed of montmorillonite, a mineral from the smectite group. It forms from volcanic ash and is known for its ability to absorb water and expand, making it useful in a variety of applications.
Key Properties:
High water absorption: Bentonite can swell up to several times its dry volume when exposed to water.
Plasticity: It can be easily shaped when moist.
Adsorption capacity: It can absorb and retain ions, molecules, and gases.
Thixotropy: It becomes fluid when stirred but solidifies when allowed to stand, making it useful in drilling fluids.
Its main applications are:
Industrial applications: Drilling fluids in oil and gas exploration, binders in foundry sands, sealants for waterproofing.
Agriculture: As a soil conditioner to improve water retention.
Health and cosmetics: In detoxifying clay masks, as a digestive aid, or for wound healing.
Wine and juice clarification: To remove impurities through adsorption.
Oil and gas industry: It is primarily used as a key component in drilling fluids (or mud).
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