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Category of Packing in Tower Packing Tower packing refers to the small fluid resistance, which is suitable for the process of treating large gas volume and small liquid volume. The liquid flows from top to bottom along the packing surface, and the gas and liquid flow meet in countercurrent or co-current, depending on the specific reaction. The amount of liquid in the packing tower is small. Regardless of the gas or liquid phase, its flow pattern in the tower is close to plug flow. If the solid phase is formed during the reaction, tower packing is unsuitable. The packing tower…

Why Can the Molecular Sieve Be Used As a Solid Acid Catalyst? Ⅰ. Introduction to the molecular sieve catalyst A natural or synthetic chemical substance with a network structure. For example, when cross-linked dextran and zeolite are used as chromatographic medium, the mixture can be fractionated according to molecular size. Molecular sieves are crystalline silicates or aluminosilicates, formed by silico-oxygen tetrahedra or alumino-oxygen tetrahedra connected by oxygen bridges to form a pore and cavity system of molecular sieve molecular size (usually 0.3~2.0 nm). So it has the characteristics of sieving molecules. Also known as zeolite catalyst, it refers to a…

Production Principles of the Carbon Molecular Sieve 1. Production principles of the carbon molecular sieve for nitrogen generator Carbon molecular sieve is the adsorbent on the PSA nitrogen production equipment, which uses the principle of pressure swing adsorption to separate nitrogen from the air. The separation effect of carbon molecular sieve on oxygen and nitrogen in the air is mainly based on the different diffusion rates of these two gases on the surface of carbon molecular sieve. Gas molecules with a smaller diameter diffuse faster, and more enter the micropores of the carbon molecular sieve. Gas molecules with a larger…

Molecular Sieves Are Materials with Uniform Pores The diameter of the molecular sieve is angstroms or nanometers (nm). Molecular sieves can be microporous (2nm), macroporous (50 Ⅰ. Molecular sieve powder adsorbent Molecular sieve powder adsorbent can separate fluids according to molecular size and polarity. For the secondary fine particles of hydrocarbons, straight molecules enter the pores and are adsorbed, and branched molecules cannot enter the pores and pass through the sieve bed. Molecular sieves play an important role in unit processes such as dehydration and purification, as well as unit operations such as drying and adsorption. Catalysis is the application…

What Are the Differences Between 3A, 4A, and 5A Molecular Sieves? What is the difference between 3A, 4A, and 5A molecular sieves? Are the three types of molecular sieves the same purpose? What are the factors related to the working principle? Which industries are they used in? Ⅰ. The chemical formula of 3A, 4A, and 5A molecular sieves 1. Chemical formula of 3A molecular sieve: 2. Chemical formula of 4A molecular sieve: 3. Chemical formula of 5A molecular sieve: Ⅱ. The aperture of 3A, 4A, and 5A molecular sieves The working principle of molecular sieves is mainly related to the…

4A Molecular Sieve Can Be Used As a Molding Agent for Soap The pore size of 4A molecular sieve is 4A, which can adsorb any molecule with a diameter smaller than 4A. The factors that affect the actual performance of 4A molecular sieve generally include air flow, air temperature, air quality, air flow rate, purifier design, and purifier bed height and diameter than wait. 1. Precautions for the operation of 4A molecular sieve 4A molecular sieve should pay attention to the packaging of 4A molecular sieve during operation. Since 4A molecular sieve is very easy to absorb moisture in the…

What Industries Can the Molecular Sieve Be Used In? What industries can molecular sieves be used in? What is the role of the molecular sieve? What benefits does the molecular sieve bring to various industries? Next, Pingxiang Naike Chemical Equipment Packing Co., Ltd. can explain to you the application of this product in various fields. 1. The molecular sieve used in industrial oxygen production and drying fields In recent years, hydrothermal synthesis is the main manifestation of the technological development of molecular sieve adsorbents which are used for drying solvents in industrial oxygen production and drying fields. On the basis…

What Are Characteristics of the 4A Molecular Sieve? Due to the large pore structure and particle size of 4A molecular sieve crystals, the adsorption performance of the 4A molecular sieve is very strong. For the adsorption of non-ionic surfactants, 4A molecular sieve is 3 times that of NTA (secondary aminotriacetate) and sodium carbonate, and 5 times that of sodium tripolyphosphate (STPP) and sodium sulfate, so this property is used for agglomeration molding. It would make sense to produce more concentrated surfactants in high strength detergents to produce products with good wash and flow properties. 1. The 4A molecular sieve has…

What Are the Applications of Molecular Sieve in Petrochemical Industry? In the more than half a century since the advent of molecular sieves, the technologies have been mainly used to meet the needs of three traditional fields, first of all, in the catalytic process of traditional petroleum and chemical industry, then in the ion exchange process required for the treatment of waste gas and waste liquid in the daily necessities industry, coal mines and radioactive industries, and so on. The application of molecular sieves in the petrochemical field continues to expand, which promotes the rapid development of the national economy.…

Method for Strengthening Performance of Molecular Sieve Molecular sieves are materials with uniformly sized pores (very small pores). The size of these pores is similar to the size of small chemical molecules. Therefore, large molecules cannot enter the molecular sieve or be adsorbed, while small molecules can. As a mixture of molecules migrates and passes through a fixed bed of porous semisolid matter that is called a sieve (or matrix), the components with the highest molecular weight (which cannot enter the molecular pores) leave the bed first and then are followed by sequentially smaller molecules. Some molecular sieves are used…

The Shape and Performance of Solid Adsorbent of Activated Alumina 1. Shape and performance of activated alumina Solid adsorbents are used in reactors with different particle shapes. Early adsorbents did not pay attention to the shape, and often only crushed the bulk material, and then screened out the particles with uneven particle size and irregular shape for use. Due to the indeterminate shape, the airflow distribution during use is very uneven, and the adsorption reaction is affected. The sieved small particles and powder materials cannot be used and discarded, thus causing a lot of waste. With the continuous improvement of…

How To Activate Molecular Sieve? Why Do You Need to Activate a Molecular Sieve? In the process of storage and transportation, a molecular sieve will absorb a small amount of water and carbon dioxide. Activation can ensure molecular sieve maximum adsorption capacity. For a molecular sieve, activation means emptying the adsorbent to expose the surface, which can affect the adsorb of the reaction materials and shorten the reaction induction period. What is a Molecular Sieve? Molecular sieves adsorb different substances by their adsorption priority and aperture. It is an aluminosilicate microporous crystal. Molecular sieves have four major uses and various…