The performance of the molecular sieve dryer

molecular sieve dryer as the powder crystal, with metallic luster, hardness is 3 ~ 5, the relative density of 2 ~ 2.8, the natural zeolite has a color, synthetic zeolite is white, insoluble in water, thermal stability and acid resistance increased with the increase of SiO2 / Al2O3 ratio increased. molecular sieve xh-5 has a large specific surface area, 300 ~ 300 m2 / g, the highly polarized crystal surface, as a kind of efficient adsorbent, is also a kind of solid acid, surface has high concentration of acid and acid strength, can cause is catalytic reaction of carbon ionic. When the composition of the metal ion and other ions in the solution during the exchange, adjustable aperture, change its adsorption properties and catalytic properties, which made the performance of different molecular sieve catalyst.

The kinds of molecular sieve xh-7

molecular sieve dryer has two kinds of natural zeolite and synthetic zeolites. (1) most of the natural zeolite by volcanic tuff and gray matter in the Marine sedimentary rocks coagulation or react to form in the lacustrine environment. Has been found that there are more than 1000 zeolite ore, more important is 35, common clinoptilolite and mordenite, erionite and ling zeolite, etc. Mainly distributed in the United States, Japan, France and other countries, China is also found that there is a lot of mordenite and clinoptilolite deposits, Japan is the largest country in the production of natural zeolite. (2) by natural zeolite resource constraints, starting in the 1950 s, a large number of the synthetic zeolite.

Commodity molecular sieve xh-7 common prefix digital classifying crystalline structure of different molecular sieves, such as 3 a, 4 a, 5 a molecular sieve. 4 A type or class A in the table, aperture 4 A. . Type A molecular sieve as containing Na + Na - A, if one was Na + K + displacement, pore diameter of about 3 A; For type 3 a molecular sieve; If there is more than A third in the Na - A Na + Ca2 + displacement, pore diameter of about 5 A; , that is, the type of 5 a molecular sieve.

The working principle of double glazing desiccant molecular sieve

Adsorption function: double glazing desiccant molecular sieve of matter from the physical adsorption (van der Waals force), the crystal inside the cavity has a strong polarity and coulomb field, the polar molecules (water) and unsaturated molecules exhibit strong adsorption ability.

Sieving function: double glazing molecular sieve pore size distribution is very uniform, only the molecular diameter smaller than the diameter of the cavity material made it into the zeolite crystal inside the cave.

Through adsorption priorities and the size to distinguish between different materials of molecules, so the image of a called "molecular sieve".

Functions and features of

Porous materials has been widely used in many fields, such as microporous molecular sieve xh-11 as the main catalytic materials, adsorption materials and ion exchange separation materials, in oil processing, petrochemical industry, fine chemical industry and daily chemical industry plays a more and more important role.

desiccant for insulated glass (also called synthetic zeolite) is a kind of silicon aluminate microporous crystals. It is composed of silica and alumina tetrahedron basic skeleton structure, there is a metal cation in the lattice (such as Na +, K +, Ca2 +, Li +, etc.), to balance the extra negative charge in the crystal. Molecular sieve type according to its crystal structure is mainly divided into: type A, X, Y, etc.

Molecular sieve relevant standards:

The 3 a molecular sieve, the 4 a molecular sieve 5 a molecular sieve and its test method, the 13 x molecular sieve

Molecular sieve static water adsorption method, the measuring method of the molecular sieve adsorption dynamic water"

The determination of zeolite molecular sieve adsorption dynamic carbon dioxide, the granular molecular sieve size measurement method, the molecular sieve bulk density measurement method, the molecular sieve crush resistance test method, the abrasion resistance performance of the refrigeration system using molecular sieve desiccants test method"

Industrial activated alumina, the air separation equipment technical conditions of inspection and acceptance with activated alumina

the Performance of zeolite 3a molecular sieve

Yu and zeolite 3a molecular sieve  metallic luster, hardness of 3~5, relative density is 2~2.8, colored with natural zeolite, synthetic zeolite is white, insoluble in water, thermal stability and resistance to acid increasing with the improved SiO2/Al2O3 ratio.mole sieve dehydration have very large surface areas, 300~1000m2/g, Crystal surface in highly polarized, is a kind of high efficiency adsorbent, also a solid, the surface has a high acid concentration and intensity, can cause the carbenium ion-catalyzed reactions.When the composition of the metal ion exchange with other ions in solution, you can adjust the aperture, change its adsorption and catalytic properties, which produce different molecular sieve catalysts.

the Type of Synthesis of zeolite and natural zeolite molecular sieve

Synthesis of zeolite and molecular sieve zeolite in two ways.① the most natural zeolite by volcanic Tuff and tuffaceous sedimentary rocks in marine or lacustrine environment reacts to form.Have been found to have more than 1000 kinds of zeolite minerals, more important has 35 species, common clinoptilolite, mordenite zeolite, Mao Feishi and diamond, etc.Mainly in the United States, Japan, France and other countries, China has a number of mordenite and clinoptilolite zeolite deposit, Japan is the biggest national exploitation of natural zeolite.② resource constraints and by natural zeolite, in the 1950 of the 20th century, the extensive use of zeolite synthesis (see table).

Commodities commonly used prefixes digital crystal structure different mole sieve dehydration  re classified, such as 3A, 4 a, 5 a molecular sieves.In table 4 type a is a class aperture 4Å.Recorded as a molecular sieve containing Na+ Na-A if Na+ K+ replacement, Aperture is approximately 3Å, Which is 3 a molecular sieve;1/3 Na+ over Na-A Ca2+ replacement, Aperture is approximately 5Å, Which is 5 a molecular sieves.

the definition of Molecular sieve

Magnitude, it only allows a diameter smaller than the diameter of the molecules into, so molecular sieve zeolite in the mixture can be screened by size.It is called molecular sieve.Back more than 200 years ago, b.Kelongshitaite first named aluminosilicate zeolites, chemistry formula for m and n are metal ions and Valence;Number of molecule x is silicon dioxide;Y is the number of water molecules;P is the atomic number of aluminum;Q is the number of silicon atoms.molecular sieve dehydration process in the chemical industry as a solid adsorbent material desorption of adsorbed by the molecular sieve can be recycled after use.Also used for gas and liquid drying, purification, separation and recycling.Starting in the 1960 of the 20th century, used as a catalyst in the petroleum refining industry, has now developed a variety suitable for different molecular sieve catalysts for catalytic processes.