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Molecular Sieve Types and Structures Ⅰ. There are two types of molecular sieves: natural zeolite and synthetic zeolite. 1. Most natural zeolites are formed by the reaction of volcanic tuff and tuffaceous sedimentary rocks in marine or lacustrine environments. At present, more than 1,000 kinds of zeolite minerals have been discovered, of which 35 are more important. The common ones are clinoptilolite, mordenite, erionite and chabazite. 2. Because is limited by resources, people later use synthetic zeolite in large quantities. Commercial molecular sieves often use prefix numbers to classify molecular sieves with different crystal structures, such as type 3A, type…

Conditions That Need to Be Controlled for Carbon Molecular Sieve Nitrogen Production 1. The conditions for nitrogen production by carbon molecular sieve – air compression purification process. It is necessary to ensure the pure feed air flow into the carbon molecular sieve adsorption column, because particles and organic atmosphere into the adsorption column will block the micropores of the carbon molecular sieve, and gradually reduce its separation performance. The methods of purifying feed air show as follows: (1) Keep the air inlet of the air compressor away from the places with dust, oil mist or organic atmosphere. (2) Passing through…

Application and Performance of 3A Molecular Sieve 3A molecular sieve is an alkali metal aluminosilicate, and sometimes, it is also called 3A zeolite molecular sieve. The pore size of the molecular sieve 3A is 3Å. It is mainly used for adsorbing water and does not adsorb any molecules with a diameter greater than 3Å. According to the characteristics of industrial applications, molecular sieve has the ability of fast adsorption speed, many regeneration times, crushing strength and anti-pollution, which improves the utilization efficiency of molecular sieve and prolongs the service life of molecular sieve. A molecular sieve is an adsorbent material…

Specific Decontamination Performance of 3A Molecular Sieve The main purpose of using molecular sieves in the industry is to make them perform decontamination functions. For example, 3A molecular sieve is a common molecular sieve, and its filtration effect is above medium. After being filtered, industrial wastewater can be reused, thus saving a lot of resources and reducing pollution. Any industry must take environmental protection and sustainable development as the premise, and improve the speed of production technology and enterprise development to ensure better development of the company and reduce harm to the environment. Converting hard water to soft water will…

3A Molecular Sieve is the Most Suitable Desiccant for Insulating Glass Ⅰ. The introduction of molecular sieve Molecular sieve is a synthetic hydrated silicate aluminate (zeolite) or natural zeolite with the function of screening moleculars. Its pore size is similar to general molecular size, which can be controlled by different processing technology. Only molecules with diameters smaller than the aperture are allowed in. Besides adsorbing water gas, it can also adsorb other gases. According to the ratio of silicon to aluminum and crystal structure, molecular sieve can be divided into A type, X type, Y type, etc. According to the…

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…

Main Components of Carbon Molecular Sieve and Principles of Nitrogen Production Carbon molecular sieve is a new type of adsorbent developed in the 1970s. It is an excellent non-polar carbon material. Nitrogen-making carbon molecular sieve is used to separate air and enrich nitrogen. The cryogenic high-pressure nitrogen production process has the advantages of low investment cost, fast nitrogen production speed, and low nitrogen cost. Therefore, it is currently the preferred pressure swing adsorption and nitrogen-rich adsorbent for air separation in the engineering industry. This nitrogen is used in the chemical industry, oil and gas industry, electronics industry, food industry, coal…

Regeneration Method and Application of 4A Molecular Sieve In the laboratory, it can be activated and dehydrated by drying in a muffle furnace at a temperature of 350°C and drying under normal pressure for 8 hours (if there is a vacuum pump, it can be dried at 150°C for 5 hours). The activated molecular sieve is cooled in the air to about 200°C (about 2 minutes) and stored in a desiccator immediately. If possible, use dry nitrogen for maintenance during the cooling and storage process to avoid re-adsorption of water vapor in the air. The old molecular sieve after use…