Date of issue: August 16, 2018 Author: powder technology website
1、 Current situation of global bentonite industry
According to the report released by the Market Research Institute transparency market research, the global bentonite market value was US $1.42 billion in 2015, and it is estimated that the market value will increase to US $1.85 billion by 2024, with a compound annual growth rate of 3% during this period.
2、 Excellent performance and application of Bentonite
The main component of natural bentonite is montmorillonite, which has the properties of water absorption, swelling, cation exchange, thixotropy, cohesiveness, adsorption, thickening, lubricity, stability, decolorization, etc. it is known as "universal" clay. It can be used as binder, suspending agent, stabilizer, decolorizer, etc. it is widely used in food, chemical, petroleum and other industries. Bentonite in China is mainly concentrated in the northeast and eastern coastal provinces, although the reserves are large, but the degree of development and utilization is very low.
1. Function of filter in juice clarification
Compared with the enzyme method used in the industrial production of apple juice, the clarification method of chitosan loaded with bentonite not only has better clarification effect, but also greatly shortens the clarification time, speeds up the production cycle, and is simple and convenient in operation; compared with the flocculation method using chitosan alone, the clarification process is much more controllable and easy to operate
2. Application in catalyst and its support
Bentonite is an ideal inorganic catalyst because of its small particle size, large surface area and molecular intercalation. In China, phosphoric acid / Bentonite catalyst is used in the production of ethanol from olefin hydration. Bentonite modified by Zn (NO3) 2 and other salts is used in the photochemical degradation of aniline in water under xenon lamp simulated sunlight irradiation. As a new type of microporous solid acid catalyst, metal hydroxide pillared bentonite has been widely used.
3. Application in food packaging materials
At present, a series of nanocomposite plastics based on polyamide, polyester, polystyrene, polyaniline and polyurethane have been successfully prepared with natural mineral bentonite as dispersion phase. Among them, nylon 6nm plastic has excellent properties and high performance price ratio. The nylon 6nm plastic film has better barrier, mechanical properties and transparency, so it becomes an ideal food packaging material.
After the reaction, stop heating and stirring, wash and filter the suspension, dry it, disperse and depolymerize to obtain organic bentonite product.
4. Application as feed additive
Bentonite contains many kinds of elements, mainly silicon, potassium, sodium, calcium, aluminum, copper, zinc, cobalt, manganese, chlorine and so on. Most of them are necessary macro and trace elements in poultry. Some experimental results show that adding bentonite to the diet of laying hens has obvious effects on improving laying rate, egg weight, feed conversion rate, reducing damaged eggs and increasing economic benefits [4]. 3.5 application in wine brewing: bentonite has the characteristics of expansibility and permanent negative charge between layers, which can effectively adsorb protein, pigment and other colloidal ions with positive charge to produce coagulation. It can be used in the clarification and stabilization of wine and fruit wine. It was reported that the clarification effect of domestic zgb-3 bentonite on grape juice and the stabilization effect on copper, protein and pigment in wine were studied with French bentonite as control. The results show that zgb-3 bentonite can achieve the same effect as French bentonite in the above aspects, only the volume proportion of sediment is slightly higher than French bentonite.
3、 Suggestions on the development of bentonite industry
Under the new situation, how should China's Bentonite industry develop?
First, improve the industry access conditions, speed up the implementation of large enterprise group strategy, and improve the industry concentration. Cultivate large companies with strong R & D and innovation ability and leading products. Based on this platform, through the integration and upgrading, we can promote the industrial structure adjustment and technological innovation of bentonite industry, and achieve the efficient and comprehensive utilization of mineral resources.
Second, strengthen the bentonite basic research and deep processing technology innovation. Strengthen the research on the basic properties of bentonite and the innovative research and development of deep processing technology and equipment, accelerate the solution of the technical constraints on the development of China's Bentonite industry, improve the deep processing technology and product quality control technology of China's bentonite, promote the development of large-scale and intelligent processing equipment, develop bentonite series and high-end products, and fully realize the resource value of different endowments To give full play to the resource advantages of bentonite in China.
Thirdly, we should pay attention to the development and application of bentonite functional mineral materials. Because of its functional properties, bentonite has attracted much attention as a kind of energy-saving and environment-friendly functional mineral material. At the same time, it has opened up a new space for the development of bentonite industry. In the future, the demand for bentonite in this field will increase day by day. We should pay attention to the research and development of bentonite functional mineral materials and expand the application field and scope of bentonite.
In short, China's Bentonite industry should promote the supply side reform, accelerate the transformation of development mode and economic structure adjustment, and accelerate scientific and technological research and development, so as to transform China from a big bentonite country into a powerful bentonite country.
