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Introduction to Bentonite

TIME:21-03-12    NUM:0

Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. The structure of montmorillonite is a 2:1 type crystal structure composed of two silicon-oxygen tetrahedra and a layer of aluminum-oxygen octahedron. Due to the formation of montmorillonite unit cells There are certain cations in the layered structure, such as Cu, Mg, Na, K, etc., and the interaction of these cations with the montmorillonite unit cell is very unstable, and it is easy to be exchanged by other cations, so it has good ion exchange. Foreign countries have been applied in more than 100 departments in 24 areas of industrial and agricultural production, and there are more than 300 products, so people call it "universal soil."

Bentonite is also called bentonite, bentonite or bentonite. my country has a long history of developing and using bentonite, which was originally only used as a detergent. It is really widely used but only has a history of more than a hundred years. The first discovery in the United States was yellow-green clay in the ancient strata of Wyoming. It swelled into a paste after adding water. Later, people referred to all clays with this property as bentonite. In fact, the main mineral component of bentonite is montmorillonite, with a content of 85-90%. Some properties of bentonite are also determined by montmorillonite. Montmorillonite can be in various colors such as yellow-green, yellow-white, gray, white and so on. It can be a dense block or loose soil. It has a slippery feel when rubbed with your fingers. The volume of the small block swells several times to 20-30 times after adding water. It is suspended in water, and it is mushy when there is little water.  The properties of montmorillonite are related to its chemical composition and internal structure.