Bentonite is an aqueous clay mineral mainly based on montmorillonite, because it has special properties. Such as: expansion, adhesion, adsorption, catalytic, thixotropic, suspension and cation exchange, etc., so widely used in various industrial fields. Abroad has been in the field of industrial and agricultural production 24 more than 100 departments in the application, there are more than 300 products, so people call it ‘universal soil’. 

Sodium bentonite is based on the montmorillonite layer exchangeable cation type, content to be divided: alkaline coefficient greater than or equal to 1 for sodium bentonite, less than 1 for calcium bentonite. Artificial sodium bentonite due to sodium conditions vary, the failure temperature varies, but are lower than the natural sodium bentonite; natural sodium bentonite expansion force than the artificial sodium bentonite; natural sodium bentonite than artificial sodium bentonite c-axis orderliness, finer grains, strong dispersion. 

Sodium bentonite than calcium-based bentonite physical and chemical properties and process technology performance is superior. Mainly in: slow water absorption, but the water absorption rate and expansion times; high cation exchange; good dispersion in water media, high gel price; its colloidal suspension thixotropy, viscosity, lubrication, pH value; good thermal stability; high plasticity and strong adhesion; hot and wet tensile strength and high dry compressive strength. So the use of sodium bentonite and high economic value. 

Artificial sodium bentonite physical and chemical properties depend on the type and content of montmorillonite it contains, but also depends on the method of artificial sodium and artificial sodium degree.