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Performance of Molecular Sieve 1. What is a molecular sieve? Molecular sieve is a synthetic hydrated aluminosilicate (bubble zeolite) or natural zeolite with the function of screening molecules. Molecular sieves have a uniform microporous structure, and these tiny pores have a uniform diameter, which can adsorb molecules smaller than their diameter into the pores, thereby separating molecules with different diameters, different polarities, different boiling points, and different saturations, so that it has the function of “sieving” molecules. 2. Types of molecular sieve Molecular sieves are different according to the pore size, molecular sieve types are A type: potassium A (3A),…

What Should I Pay Attention to when Storing Molecular Sieve Powder? For molecular sieve powder, many people do not know it very well. In fact, it is artificially synthesized and has many advantages, such as purifying exhaust gas. Therefore, it is now used in many fields. Many people do not know precautions when storing and using molecular sieve powder, some problems may arise in this way. Only when we understand the storage method correctly can we play the excellent role of molecular sieve powder. The following will explain specifically what to pay attention to when storing molecular sieve powder and…

How Do Molecular Sieves Remove Water Molecular sieves have a large surface area, generally 600-1000 square meters per gram. It has a strong adsorption capacity for polarized and polarizable molecules. Water is a strongly polarized molecule, and its molecular diameter is smaller than that of a molecular sieve which is easily absorbed by a molecular sieve. Molecular sieves are best for water removal as in the high temperature above 230℃, they can still hold water molecules well. What Is Molecular Sieve? A molecular sieve is a kind of crystalline aluminosilicate with many regular and uniform pores in the crystal structure,…

Random Packing VS. Structured Packing Packing generally refers to materials that are filled with other objects. In chemical engineering, packing refers to the inert solid materials installed in the filling tower, such as Pall ring and Lacey ring, whose role is to increase the contact surface between the atmosphere and liquid, so that they mix strongly with each other. The purpose of packing is to create surface area for vapor/liquid contact so that Mother Nature (and Father Thermodynamics) can produce chemical separation. Chemical separation includes distillation, absorption, and stripping. There are two main types of packing used in mass and…

Four Kinds of Treatment of Dampened 4a Molecular Sieve How do you treat moisture absorption when the 4a molecular sieve is not tightly packed or the storage environment is damaged? Today we will discuss the adsorption capacity of molecular sieves and the treatment of moisture absorption. It is widely known that molecular sieve has a highly strong adsorption. It can not only absorb moisture, but also adsorb impurities in the air. Therefore, people often take advantage of this quality to carry out adsorption work in industry in order to achieve good effects on separation and adsorption. What should we do…

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…

How Long is the Life Cycle of Activated Alumina Adsorbent? This product is made from pure natural minerals and activated hygroscopic agent. It is green, non-toxic, tasteless and does no harm to the human body. The product has a good adsorption performance, activated adsorption and the function of static dehumidification under the normal temperature and humidity. The range of the application of the activated alumina includes: widely used in the areas of hardware, electrical appliances, leather shoes, clothing and other industries. The activated alumina desiccant is safe, environment- friendly and naturally degradable. 1. The function of the activated alumina desiccant…