Bentonite, predominantly montmorillonite aqueous clay minerals, the chemical composition of montmorillonite: (Al2, Mg3) [Si4O10][OH]2? NH2O, because it has special properties. Such as: swelling, adhesion, adsorption, catalysis, thixotropy, suspension and cation exchange etc., so wide used in various industrial fields. Has been applied abroad in industrial and agricultural production in 24 areas in more than 100 departments, more than 300 products, which is called "universal soil".
Bentonite is also called bentonite and bentonite rock. The development history of China's use of bentonite has a long, just as a detergent. (the Sichuan area for hundreds of years ago in open-pit mine, the locals bentonite clay powder). Were really used only a few hundred years of history in the United States. Ancient formation is found in Wyoming, a green and yellow clay, after adding water into a paste, then people who have this kind of clay, called bentonite. In fact, the main mineral composition of bentonite is montmorillonite. The content of 85-90%, some properties of bentonite are all is decided by the montmorillonite. Montmorillonite can show various colors such as yellow green, yellow white, gray, white and so on. A dense block, but also for the soil bulk, by hand grinding with smooth feel, small body water volume swell after several times to 20-30 times, is suspended in the water, water When it is low, it is mushy. The nature of montmorillonite is related to its chemical composition and internal structure
The properties of montmorillonite are closely related to the exchangeable cation species between layers. According to the types of the main exchangeable cations between layers, montmorillonite is usually divided into calcium montmorillonite and sodium montmorilloniteMontmorillonite adsorption and cation exchange properties, which can be used to remove oil, gasoline and kerosene toxin purification, wastewater treatment; water absorption due to good swelling properties and dispersion and suspension and mud, so used for drilling mud, flame retardant (suspended fire); also can do filler in papermaking industry, optimization the coating properties such as adhesion, covering power, water resistance and washing resistance; because it has good cohesive force, can replace the starch used in the textile industry in both grain and yarn sizing, non pilling, smell is not a paddle, is really a must.
