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Molecular Sieve Poisoning 1. Carbon Molecular Sieve From a chemical point of view, chlorine, hydrogen chloride and carbon do not react at room temperature. Moreover, the content of chlorine and hydrogen chloride in the air is extremely small. So how can carbon molecular sieve be poisoned? Carbon molecular sieve has many micropores. Chlorine gas and hydrogen chloride can react with the solid particles in fine dust in the air and deposit on the surface of . Although the daily amount is small, the surface of the carbon molecular sieve is covered by sediment after a few years. When a large…

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…

The Common Type A Molecular Sieve Uses 1. 3A molecular sieve 3A molecular sieve is mainly used for drying various liquids (such as ethanol), air, refrigerant, natural gas, methane gas; it is also used for drying unsaturated hydrocarbons and cracked gas, ethylene, acetylene, propylene, butadiene. The main application areas are architectural glass industry, gas refining and purification, petrochemical industry, etc. 2. 4A molecular sieve is mainly used for the drying of natural gas and various chemical gases and liquids, refrigerants, medicines, electronic materials and variable substances, the purification of argon, and the separation of methane, ethane, and propane. Its main…

The Characteristics of Common Type A Molecular Sieve 1. 3A molecular sieve 3A molecular sieve is an alkali metal aluminosilicate with a pore size of about 0.3 nanometers, which is mainly used to adsorb water. It does not adsorb any molecules larger than 0.3 nanometers in diameter, and is also called . 2. 4A molecular sieve The has a pore size of about 0.4 nanometers and can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene, etc. Any molecule with a diameter greater than 0.4 nanometers cannot be adsorbed, and the selective adsorption performance of 4A molecular…

The Replacement Method of Activated Alumina Desiccant 1. Remove the activated alumina in the adsorption tank Open the bottom flange of the adsorption and drying device, remove the activated alumina in the adsorption tank, and then use a vacuum cleaner to clean the dust and residue at the bottom. 2. Check the silk screen under the bottom plate of the adsorption tank Check whether the silk screen under the bottom plate of the adsorption tank is damaged. If it is damaged, replace it with the stainless steel 40 mesh or 60 mesh screen, which is a double-layer stainless steel screen.…

The Particle Diameter and Use Method of 4A Molecular Sieve 1. The particle diameter of 4A molecular sieve 4A molecular sieves are divided into strips and spherical shapes, and the diameters of different shapes are also different, but the size of the molecules that can be adsorbed remains unchanged. The granular shape is spherical, with a diameter of 1.7 to 2.5mm and 3.0 to 5.0mm. 2. How to use 4A molecular sieve 4A molecular sieve is a type of A molecular sieve. The cation is sodium ion. The pore diameter is 4nm. It mainly adsorbs molecules with a molecular sieve…

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…