Modified bentonite is an important direction for industry upgrading

Bentonite is an important non-metallic mineral whose main component is montmorillonite, which has adsorption, expansion and pulping properties. With the continuous advancement of science and technology, the application field of bentonite has been continuously expanded, the market’s requirements for its performance and quality have continued to increase, the technical research of bentonite has continued to deepen, and new processes have continued to emerge. Modified bentonite can improve the performance of traditional bentonite and enhance one aspect of its characteristics, which is an important direction for the diversified and high-end development of the bentonite industry.

Modified bentonite uses bentonite as raw material for performance improvement. Globally, bentonite resources are mainly distributed in China, the United States, Canada, Mexico, Brazil, India, Japan and other countries. China is rich in bentonite reserves, and its proven reserves are ranked first in the world. There are mineral deposits in most parts of the country, mainly in Xinjiang, Guangxi, Inner Mongolia and other places. In the past five years, our annual output of bentonite has been maintained at about 5.6 million tons, which is the largest bentonite producer in the world, providing sufficient raw materials for the development of my country’s modified bentonite industry.

The common preparation methods of modified bentonite mainly include activation modification method and modifier modification method. The activation modification method also includes thermal activation method, acid activation method, hydrogen activation method, salt activation method, etc. The first two methods are widely used; the modifier modification method can use inorganic modifiers, organic modifiers, composite Modifier to modify. Modified bentonite can improve some of its properties, such as improving its adsorption, thereby improving its efficiency and application value, thereby expanding its application range and expanding its demand scale.

Modified bentonite can be widely used in papermaking, textile printing and dyeing, plastics, environmental protection and other fields. In the field of papermaking, modified bentonite with large specific surface area, excellent dispersibility, high whiteness and high purity can be used as a multifunctional white mineral filler for paper, and can reduce the water permeability of paper; in the field of textile printing and dyeing, modified bentonite It can be used to produce sizing and dyestuffs, and it can disperse, stabilize and bond during sizing and coloring, so as to improve the quality and production efficiency of sizing and dyeing. In the field of plastics, modified bentonite can be used as filler to modify resins. In the field of environmental protection, modified bentonite can be used for wastewater and waste gas treatment, adsorbing heavy metal ions, oil, tar and other pollutants.

There are a large number of bentonite production enterprises in my country, but most of them focus on the production of low-end products, the technical content and added value of the products are low, the competitiveness of enterprises is weak, and the profitability is limited. my country’s bentonite industry is undergoing transformation and upgrading, and the market demand for high-performance bentonite continues to increase, and modified bentonite has a good development prospect.