How to make sodium bentonite particles
Bentonite is a kind of inorganic non-metallic mineral with great development value. It is an hydrous silicate acid with montmorillonite as its important component. According to the Yao natural montmorillonite containing exchangeable cations and the relative content is divided into calcium montmorillonite, sodium montmorillonite, Magnesium Lithium Montmorillonite, montmorillonite, montmorillonite and hydrogen. Montmorillonite, which is mainly composed of Na montmorillonite, is called Na bentonite, and montmorillonite, which is mainly composed of calcium montmorillonite, is called calcium based bentonite.
At present, most of the production by wet process, dry process is simple, but the product of free acid content is high, quality is poor, by the dry process improvement, treatment with inorganic acid free, can ensure the quality of clay.By acid activation, the exchangeable calcium ion is replaced by one valence hydrogen ion to form a porous surface, and the specific surface area and porosity are increased, so that the adsorption and ion exchange of bentonite have been further enhanced.
Natural bentonite is usually calcium based bentonite, and its performance is not ideal. It can be changed into acid clay, sodium base bentonite, lithium bentonite, organic bentonite and high-purity bentonite gel by artificial modification. The deep processing of bentonite products has good adsorption, swelling, thixotropy, thickening and a series of physical and chemical properties, widely used in the fields of oil industry, paint industry, textile industry, daily chemical industry, environmental protection etc..
Because of the different geographical environment, the types of exchangeable cations are different, and the physicochemical properties of the bentonite are very different. Artificial methods change the cations between layers to change their physical and chemical properties, called artificial modifications, or modifications.
