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Porous materials are widely used in many fields, such as microporous molecular sieves, as the main catalytic materials, adsorption and separation materials and ion exchange materials, play an increasingly important role in petroleum processing, petrochemical industry, fine chemical industry and daily chemical industry.
Molecular sieve (also known as synthetic zeolite) is a kind of silica-aluminate multiporous crystal. It is a basic skeleton structure composed of silicon and aluminium oxide tetrahedrons. Metal cations (such as Na+, K+, Ca2+, Li+) exist in the lattice to balance the excess negative charges in the crystal. Molecular sieves can be classified into A type, X type and Y type according to their crystal structure.
Criteria for molecular sieves:
"3A Molecular Sieve", "4A Molecular Sieve", "5A Molecular Sieve and Its Test Method", "13X Molecular Sieve"
"Static Water Adsorption Method for Molecular Sieves" and "Dynamic Water Adsorption Method for Molecular Sieves"
"Determination of Dynamic Carbon Dioxide Adsorption on Zeolite Molecular Sieves", "Particle Sieve Size Measurement Method", "Molecular Sieve Deposition Density Measurement Method", "Molecular Sieve Crushing Resistance Test Method", "Test Method of Molecular Sieve Desiccant Abrasion Resistance for Refrigeration System"
"Industrial Activated Alumina", "Technical Conditions for Acceptance and Acceptance of Activated Alumina for Air Separation Equipment"
Manufacturer produces all kinds of desiccant activated alumina molecular sieve ceramic balls
Activated alumina, also known as activated bauxite, is commonly called "activated alumina" in English for the use of alumina in catalysts. It is a porous, highly dispersive solid material with a large surface area, and its microporous surface has the characteristics required by catalytic action, such as adsorption performance and table. Because of its surface activity and excellent thermal stability, it has been widely used as catalyst and catalyst carrier for chemical reaction. High-performance activated alumina can bring the following benefits in amorphous refractory ingredients: increasing green body density, fluidity, strength, increasing secondary mullite production, reducing water addition and porosity. In addition, activated alumina can also be used as a desiccant, with high water absorption, fast drying speed and regeneration (400-500K baking).
Activated alumina belongs to the category of chemical alumina. It is mainly used for adsorbents, water purifiers, catalysts and catalyst carriers. According to different uses, its raw materials and preparation methods are different. Activated alumina (molecular formula Al2O (3-x) (OH) 2x, 0 < x < 0.8) is one of the inorganic chemical products widely used in the world. Activated alumina has high activity because of its porous structure, high specific surface area and unstable transition state. In the petrochemical industry and fertilizer industry, it is widely used as catalyst and catalyst carrier. Activated alumina has adsorption properties, so it can be used as desiccant for gas and liquid, adsorbent for gas purification, fluoride removal agent for drinking water, color and odor elimination agent for industrial sewage, etc. Nowadays, the main industrial activated alumina products are produced by rapid dehydration method. Activated alumina refers to calcined alumina (20% - 90%) which is fully grinded and composed of a-Al2O3 with primary crystal size of 1 micron.
Formula: Al2O3.nH2O (Molecular Weight: 101.96 + nH2O) CAS No.: 1344-28-1
The nano-alumina XZ-L14 exhibits a white fluffy powder state with a crystal form of alpha. The particle size is 20 nm and the specific surface area is more than 50 m/g. It has uniform particle size distribution, high purity, high dispersion and alpha-Al2O3. It has low specific surface area and high temperature inertia, but it is not active alumina and has almost no catalytic activity. It has strong heat resistance, good formability, stable crystalline phase, high hardness and good dimensional stability. It can be widely used in various plastics, rubber, ceramics and refractories. The reinforcing and toughening of products such as ceramics, especially the compactness, smoothness, cold and hot fatigue, fracture toughness, creep resistance and wear resistance of polymer products are particularly remarkable. Because alpha phase alumina is also a far-infrared emitting material with excellent properties, it has been used in chemical fibers and high-pressure sodium lamps as far-infrared emission and thermal insulation materials. In addition, alpha phase alumina has high resistivity and good insulation performance, which can be used in the main parts of YGA laser crystal and integrated circuit substrates.
Technical Indicators 1. White powder appearance of nano-alumina slurry XZ-L14. 2. Nano-alumina XZ-L14 crystal phase alpha phase. 3. Average particle size (nm) of nano-alumina XZ-L14 is 20 +5.4. The content of nano-alumina XZ-L14 is more than 99.9%.