Bentonite is one of the most essential minerals, which is widely used in the various fields of human activity. Bentonite clay has been found in Benton fortress in American, so the name comes from it.

Bentonite is sedimentary strata mainly composed of clay minerals of the montmorillonite group. Besides them bentonite also has hydromica bentonites, kaolin, sepiolite, palygorskite, etc. Bentonite has a high fineness, plasticity, cation exchangeability, sorption properties.