Many reactions catalyzed by zeolites are of the positive carbon ion type, and the reactions occur via positive carbon ion intermediates. Zeolites also have considerable catalytic activity for some free radical reactions and oxidation-reduction reactions.

Zeolite is the general name of zeolite family minerals, a kind of shelf-like aqueous aluminosilicate minerals, the common ones are plagioclase, filamentous zeolite, rhodochrosite, grossular zeolite and sheet zeolite, etc. They have unique ion exchange, ion exchange, catalytic, thermal stability and acid resistance, etc. They are widely used in the fields of building materials, environmental protection, ion exchange, catalytic cracking, daily light industry, petrochemical industry, agriculture and animal husbandry, paper making and plastics, etc.

Zeolites have superior adsorption, ion exchange, catalytic and stabilization properties.1.1 Adsorption properties When the water in the zeolite structure is removed. The pores with large inner surface are formed. It can adsorb and store a large number of molecules. Therefore, the adsorption capacity

There are many different kinds of zeolites, 36 of which have been discovered. Their common feature is that they have a shelf structure, which means that in their crystals, molecules are connected together like a frame, and many cavities are formed in the middle. Because there are many water molecules in these cavities, they are water-bearing minerals.

The research on multi-stage pore zeolites has attracted a lot of attention because of their potential and practical applications. Among them, macroporous high-silica zeolites with three-dimensional twelve-membered pore structure, named Beta zeolites, have special pore structure and powerful acid catalytic properties and structural selectivity, which are widely used in petroleum refining and petrochemical processes such as hydrocracking, isomerization, alkylation and dewaxing.

At present, the world's leading fertilizer companies such as Yara, Kamp, Echem Group and other functional fertilizer companies from Italy, Spain, the United Kingdom, France, South Africa, etc., have invested more efforts in the research and development and production of adsorption and soil improvement products, and believe that zeolite will become a major highlight of the global agricultural market.