Effect of activated alumina

Modern gas purification activated alumina, water vapor and some of the liquid has the ability to selective adsorption. After removing the water saturation adsorption regeneration can be heated at about the recovery 175-315 ℃.regeneration of molecular sieves can be repeated rehabilitation. In addition to use as a desiccant, it can also adsorb vapors from contaminated lubricating oxygen, hydrogen, carbon dioxide, natural gas or the like. And are useful as catalysts and catalyst supports, and chromatography carrier. Modern water purification activated alumina is white spherical porous particles, particle size uniformity, smooth surface, high mechanical strength, moisture absorption, no swelling maintain the status quo does not crack after absorbing water, non-toxic, odorless, insoluble in water, ethanol, fluoride has a strong adsorption, mainly used in high fluoride areas of fluoride in drinking water.

About natural gas

Adsorption equipment to use more natural gas dehydration fixed bed adsorption column. In order to ensure continuous production of dry natural gas to be cyclic operation, and to use a plurality of adsorption towers in parallel. Adsorbed amount and form of the tower, ranging from two to more than one alternate. In each adsorption tower, the cycle of three different functions or function must alternate. These three cycles are: adsorption or drying cycle, the heating or recycling, the cooling cycle.

VPSA PSA oxygen machine

pressure swing adsorption molecular sieve is a molecular sieve having a function of a mixed gas of selective adsorption, the adsorption capacity with temperature and pressure changes. Typically oxygen Pressure swing adsorption technology air separation unit adsorption bed must contain two steps; adsorption and resolution. In order to obtain a continuous product gas, usually oxygen apparatus are means more than two adsorbent beds, and from the perspective of energy and stability, in addition to setting the necessary additional steps. Usually go through each bed adsorption, release the pressure, evacuation or decompression regeneration, replacement and rinse the equalizing boost other steps, periodically repeat the operation. At the same time, each adsorbent bed, respectively, at different steps, time switch under PLC control, so that the bed several coordinated operations on the pace of practice is staggered, so that the pressure swing adsorption system can run smoothly, continuous access to the product gas .

zeochem molecular sieves

Zeolites molecular sieve having a pore size of sub-nanometer pore uniform, high specific surface area (up to 1000 m2g-1, the vast majority of inner pore surface area) and a unique surface electric field, show and activated carbon, silica gel, activated alumina, and other conventional adsorbent different adsorption properties, zeolite polar molecules exhibit specific affinity, but also has the unique ability to screening molecules. Molecular sieve adsorbent in petrochemical industry has been widely used, has a high separation effect, the operation is relatively simple, good economic advantages.

ASU sieve apparatus

Compare activated alumina and molecular sieve adsorption of water features seen: Activated alumina for higher air moisture adsorption capacity is relatively large, but with reduced air moisture adsorption capacity drops quickly. The molecular sieve even at very low water content, the same has strong water absorption. Also, aluminum plastic desorption water easily, can reduce the regeneration temperature; it heats of adsorption of water smaller than the molecular sieve, the air temperature rise is small, is conducive to the rear of the molecular sieve adsorption of CO2; and aluminum plastic also has acid resistance, molecular sieve can play a protective role. Based on these characteristics, some purifiers structure with a double bed, air purifier into the I = I side, put a layer of activated alumina. It is the first most of the water contained in the air cleared, and the molecular sieve is mainly used to remove carbon dioxide, acetylene and other hydrocarbons. Using double adsorption bed, you can extend the use of purification time. Carrying activated alumina - Zeolite bunk bed test results: purifier effective working time extension of 25% to 30%.

psa oxygen generator molecular sieve

China psa oxygen generator molecular sieve industry trends analysis and forecast report based on years of research on the molecular sieve industry, combined with molecular sieve law of supply and demand changes in the industry over the years, based on the domestic market, taking into account the global market environment, industries and enterprises within the dehydration of natural gas group conducted in-depth investigation and research. Meanwhile, the Chinese industry trends sieve analysis and forecast report also for the industry and its downstream molecular sieve characteristics of the industry, from different angles cut into the industry, as a molecular sieve industry enterprises provides a powerful data support and professional market orientation. And to provide authoritative for enterprise development strategies, investment decisions and business management, adequate and reliable decision-making. Chinese sieve analysis of industry trends and forecast report focuses on official statistics, using quantitative and qualitative research methods in writing from.

Zeolite industry literature: "China Zeolite industry trends analysis and forecast report"

Zeolite industry literature: "China Zeolite industry trends analysis and forecast report"
Zeolite industry literature: "China Molecular sieve powder industry trends analysis and forecast report" to solve: how to fully understand the overall status quo sieve industry; how to understand the macro-environment of the 5a zeolite molecular sieves industry; how to know the relevant policies of the industry to take on a molecular sieve, and seize opportunities ; how to predict the future development trend of China's sieve industry, and to take appropriate countermeasures; how to understand competitors' business strategy, and seize opportunities in the competition. Chinese sieve analysis of industry trends and forecast report will make a detailed analysis of these issues.
China Zeolite industry trends analysis and forecast report mainly uses national statistics, Customs, bank data, industrial and commercial tax department data, securities transaction data, Internet data, Commerce Department data, and other commercial databases.

Y zeolite effect

When a sample solution containing various molecules slowly flows through the gel column, each molecule in the column simultaneously with two different motion: vertical downward movement and non-directed diffusion movement. Macromolecules due to a larger diameter, not easy to enter pores of the gel particles, but only the distribution between the particles, the moving down when eluted faster. After the addition to the proliferation of small molecules in the gel particle gap, you can also enter the pores of the gel particles that enter the gel phase in the process of moving down in a gel diffusion from the particle gap then enter another gel particles, so continue to enter and spread down the speed of small molecules behind the macromolecules so large molecules in the sample elutes from the column first, slower middle molecules, molecular sieve manufacturers smallest final outflows, a phenomenon called zeolite adsorbent zeolite desiccant effect.

Japan CDS-1 successfully developed a new type of molecular sieve

Recently, Xiao Bian understand a message from the Japanese National Institute of Advanced Industrial Science and Technology (AIST) synthesis of a novel zeolite CDS-1 has been successfully developed.
 It was prepared by a layered silicate, ceca molecular sieves has a unique structure - by molecular stacking blocks.  According to the institute, said the film chemistry lab, CDS-1 between its silicate layers has many pores.  Research center will work processing CDS-1 into the film, mainly used for the separation agent catalyst.  Typically, the use of a structure-directing agent (Structure-directing agent) complex can be formed by hydrothermal synthesis of nanosized pore size.  These pores may be at about 420 ℃, using condensation polymerization method easily and economically be bonded together to form a silicate layer.

 This made one molecular structure but retain the layered silicate framework is without precedent.  Molecular sieves containing silicon, aluminum and oxygen atoms.  When the silica-alumina composite containing a high proportion of silicon, called a high-silica grace molecular sieves. This kind of molecular sieve is hydrophobic and high temperature.  AIST has a molecular sieve such intellectual property rights, the Department of silicon and oxygen by a silicate system.  It is resistant to high temperature above 800 ℃ and chemical resistance.  When immersed in a solution of an acid or a base, and still retains its original structure.

The actual application of zeolite adsorbent

Zeolite adsorbent embodiment of the utility model or the technical scheme, zeolite adsorbent for example below or the existing technical description of the need to usesimple introduction, obviously, zeolite adsorbentis only the utility model with some examples, for the power domain common technical personnel, in the premise of zeolite adsorbent do not pay a creative, emptying device zeolite adsorbent for PSA oxygen concentrator, zeolite molecular sieve desiccant and zeolite adsorbent comprises two adsorption towers two arranged at the lower end is connected with one end of the adsorption tower of the two electromagnetic valve are respectively used in pipeline. Natural gas drying of the two the electromagnetic valve is connected to the other end of the pipe is respectively for the adsorption tower; natural gas drying the vent ductconnected by pipeline are respectively connected to the vent valve vacuum pump end and - end; the other end of the vent valve and the other end of the vacuum pump is connected with the muffler through the technical scheme of the utility model,molecular sieve design gasdrying by adsorption vent tower in the add a vent valve, gas drying in equipment switching venting early, vent valve open , zeolite molecular sieve desiccant adsorption tower by the pressure difference between inside and outside of the internal exhaust gas vent part (about 70% of the total), zeolite molecular sieve desiccant residual gasin vacuum pump; gas drying reduces the vacuum pump load, zeolite molecular sieve desiccant for drying natural gas shortens working period of vacuum pump gas drying,prolong the service life of vacuum pump; design of the muffler to reduce workplacenoise, the effective protection of workers' hearing. The above is only preferred ventdevice of the utility model is a PSA oxygen machine implementation, it should be pointed out, gas drying of ordinary skill in the art, not from the creation of the utility model is the premise, gas drying can also make some deformation and improved,these all belong to the scope of protection of the utility model.

Application of the principle of a temperature swing adsorption gas dryer

Application of the principle of a temperature swing adsorption gas dryer, the partial pressure of water vapor at room temperature and a high adsorption (work); zeolite adsorbent  molecular sieve supplier  at a higher temperature, low water vapor partial pressure of parsing (regeneration). That adsorbent moisture adsorption in the adsorption process, the regeneration process again rely on high-quality effects angrily (dry air heating) thermal diffusion mechanism and can  molecular sieves msds  be completely removed. Heaters generally electric heater, heat or steam can also be used like a compressor.

The entire device consists of two parallel working drying tower and heaters, circulation fans, coolers, filter. In addition to drying tower, regeneration Taqie change requires manual operations, all the rest of the action automatically by the device can also be designed to be fully automated.

Surface roughness and zeolite having a porous structure

Surface roughness and zeolite having a porous structure, it has a strong carrying capacity, can only be uniformly adsorbed on the surface of the material, and can be adsorbed to the inner cavity and the channel, to improve the utilization of the material can  zeolite 5a  also greatly zeolite desiccant  improve the mixing of uniformity. Trace elements also can be extended release time is more conducive to animal absorption. In addition, the zeolite can request processing, 4a zeolite molecular sieves  and can choose between 30 mesh to 200 mesh. This offers a great selection of different materials to facilitate carrier and diluent specifications. Zeolite acid, bulk density of 1.2 ~ 1.4kg / liter, excluding oil and crude fiber nor static phenomenon, these characteristics are consistent with carriers and diluents should have the condition. Therefore, further research should be developed and utilized.

Zeolite molecular

It has the structure and characteristics of the crystal, the surface of a solid skeleton, the internal vpsa oxygen generator cavities of the adsorbed molecules may play a role. There are connections between each bore hole, the molecules through the pores. Due to the nature of the cavity clean, very uniform distribution of pore size molecular sieve. Zeolite crystals inside the cavity based on its size selective adsorption of molecules, ie molecules adsorbed molecules of a certain size to the exclusion of the larger 5a molecular sieves species. Zeolite molecular sieve pore or channel their system can be divided into the hole, the hole (mesoporous) and holes zeolite three groups. Pressure Swing Adsorption oxygen-enriched air can be used for separation.

molecular sieve grace

Zeolite is a natural zeolite powder molecular sieve grace ground from rock, the color is white. Can remove 95 percent of ammonia, water purification, to ease transfer water phenomenon.

Superficial knowledge of the porous molecular sieve material

Porous psa oxygen generator molecular sieve materials are an important class of inorganic non-metallic advanced materials in the fields of petrochemical, materials science, energy storage, environmental protection and management, bio-medicine, with a broad expansion of space and good prospects.  With the deepening of research work, according to the actual needs of human beings to design and synthesize more features excellent performance molecular sieve materials, as people's living standards improve, the development of human civilization and social progress, play an important role. 

 In recent years, our country has made significant progress in zeolite synthesis and preparation as well as the catalytic converter and other molecular sieve powder catalytic materials research by the national attention, since the "Plan", has won a major project of the National Natural Science Foundation, the National Climbing Program and the state's major Basic Science Program (973) and other project support, has made a series of major scientific and technological achievements.  Especially Zeolite synthesis of mesoporous materials research and other fields are at the international forefront.

Research on small grains ZSM-5 zeolite catalyst stability

 Small crystal molecular sieves 5a stability and its good resistance to carbon deposition capacity.
 Looking at the results from the test response analysis of methanol in different grain sizes of ZSM-5 zeolite on the conversion, the amount of coke ZSM-5 zeolite surface even a small amount of coke grains is higher than a large grain of ZSM-5 zeolites molecular sieve catalyst life of small grains larger than grains of zeolite long.
 This phenomenon is due to the small grain size of ZSM-5 zeolite with a large pore volume and appearance of the area and the outer surface of the acid sites and more features, large pore volume of the catalyst can effectively increase the ability of anti-deactivation, more external surface acid sites can during the reaction to ensure that there are more active center can be used; the contrary, the large grainsmolecular sieve powder with a small external surface area ratio of inner surface area and the average particle diameter is large, the molecular diffusion resistance is large, pores are formed in the macromolecular product is not easily diffuse out, thereby blocking pores, reducing the effective utilization of the acid center, to accelerate catalyst deactivation.

 More detailed information please ZSM-5 zeolite molecular sieve attention largest production base in Shandong Qilu Hua letter Hi-Tech Co., Ltd. ......

Aluminosilicate compound

Aluminosilicate compound having a cubic lattice, the alumina is mainly composed of the open connection through an oxygen bridge skeleton structure, there are a lot of uniform pore size and pore structure grace molecular sieves  are arranged neatly, the inner surface area of ​​a large hole. Also contains a lower price and ionic radius larger metal ions and compounds of state water. As water molecules in the continuous loss of heat, molecular sieve manufacturers  but the same crystal framework structure, the formation of many of the same size of the cavity, the cavity of the same diameter,molecular sieve drying, there are many pores are connected, the diameter of these small pores of uniform size, pore ratio can adsorption of molecules having a small diameter into the interior cavities in the regeneration of molecular sieves  past, but have the molecules larger than the pore exclusion, different shapes can thus molecular diameters, different degrees of polarity of the molecule, molecules having different boiling points and different degree of saturation of molecular separation open, that has the effect of "screening" of molecules, so called molecular sieves. Currently zeolite widely used in metallurgy, chemical industry, electronics, petrochemical and natural gas industries.

Solvent absorption method often used as an absorbent material glycols

Solvent absorption method often used as an absorbent material glycols, having a hydroxyl group and an ether natural gas treatment processes  bond in the molecular structure of the glycol, to form hydrogen bonds with water, have a strong affinity for water,molecular sieve drying having a high dehydration depth.
Glycol dehydration in natural gas industry has been successfully applied are: ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG) and tetraethylene glycol (TREG).  molecular sieves msds   Glycol gas dehydration is the first for diethylene glycol, due to restrictions by the regeneration temperature, poor liquid mass fraction is generally about 95%, dew point down low; while TEG regeneration easy, poor liquid mass fraction of 98% ~ 99%, with greater dew point depression and low operating costs, has been widely used.

regeneration of molecular sieves

The new machine factory oxygen concentration should be 90%, you must have accumulated timing functions, molecular sieve beads  with the oxygen concentration condition monitoring system, the sound produced under the maximum flow does not exceed 60 decibels.
A desiccant to absorb moisture from the atmosphere, in addition to a liquid, its drying principle is physically adsorbed water molecules in the structure itself, or the absorption  regeneration of molecular sieves  of water molecules through chemical means, and changes its chemical structure, into another substances.
Common desiccants are lime molecular sieve drying desiccant chemisorption, magnesium chloride, calcium chloride, phosphorous pentoxide, or soda lime, silicic acid, which are chemically absorb water molecules and change its chemical structure into another material.

molecular sieve ethanol dehydration

The use of advanced PSA (pressure swing adsorption) air separation oxygen technology is based on attracting agent (zeolites) differences in air oxygen, nitrogen adsorption capacity to achieve the separation of oxygen, nitrogen, high purity oxygen can be extracted directly from the air , is the only oxygen machine with international standards and national standards. The new machine factory oxygen concentration should be 90%, molecular sieve ethanol dehydration  you must have accumulated timing functions, with the oxygen concentration condition monitoring system, the sound produced under the maximum flow does not exceed 60 decibels.
Because it contains a large ion radius and a low price of water molecules in the water is continuously heated and combined state of the loss of metal ions, but the same crystal framework structure, the formation of many of the same size of the cavity, the diameter of the Pressure swing adsorption technology cavity there are many connected to the same pore, the diameter of these small pores of uniform size, can smaller than the pore diameter of the molecules adsorbed to the interior of the cavities, while the molecules larger than the pore exclusion, different shapes can thus molecular diameter, a different degree of polarity of the molecules, molecules having different boiling points and different degree of saturation to separate molecules, which has the effect of "screening" elements, so called molecular sieves. Zeolite is widely used in metallurgy, chemical industry, electronics, petrochemical and natural gas industries.

psa molecular sieve

Sieve-dried and photochemical properties and chemical properties are very stable. Sieve-dried at room temperature, molecular sieve drying and other compounds that do not play a role, insoluble in water and acid, nitric acid and hot alkali-soluble, does not react with carbon dioxide in the air, sulfur dioxide, oxygen, etc.; dried over molecular sieves Biochemistry are inert substance, does not dissolve, not hydrolysis, is not involved in metabolism, no acute or chronic toxic effects. psa molecular sieve and Zeolite molecular sieve desiccant and dry from the application in terms of the characteristics of nano-titanium dioxide can also be expected to dry as a molecular sieve adsorbent degradation in versatility gases, molecular sieve drying reusability, between zeolite particles and media degradation efficiency and air separate unit molecular sieve the cost and other aspects will be improved.

Molecular sieve functions and features

The porous material has been widely used in many fields, such as the main catalytic microporous molecular sieve molsiv material, adsorption and ion exchange material separation materials plays an increasingly important role in oil processing, petrochemicals, fine chemicals, and household chemicals .
Molecular sieves (also known as a synthetic zeolite) is a microporous aluminosilicate crystalline silicon. It is made of silicon oxide, aluminum oxide tetrahedra basic skeleton structure, there is a metal cation in the crystal lattice (such as Na +, K +, Ca2 +, Li +, etc.), in order to balance the negative charge excess crystals. According to their type of zeolite crystal structure is divided into: A type, X-type, Y type.
Zeolite relevant standards:
"3a molecular sieve" "4A molecular sieve" "5a molecular sieve and test methods" "13X molecular sieve"
"Water assay method static sieve" "sieve dynamic water assay method"
"Granular sieve size determination," "Determination of bulk density of molecular sieve" "sieve crush strength test method", "Standard Test Method for molecular sieve desiccant cooling systems with anti-wear performance," "Determination of dynamic zeolite adsorption of carbon dioxide."
"Industrial activated alumina," "air separation plant with activated alumina acceptance technical conditions"
(5) Pharmaceutical ---- silver zeolite antimicrobial agent.

Variety of zeolite

Zeolite nature have been found more than 30 kinds, more common well-synthetic zeolite powder supplier, chabazite, calcium, heulandite, sodium zeolite, mordenite, Stilbite, etc., are to calcium, sodium based. How much of their water content varies with ambient temperature and humidity changes. Crystals belong to crystal system with different mineral species varies, with monoclinic and orthorhombic (orthorhombic) majority. Analcime, chabazite often has equiaxed crystal form, heulandite, Stilbite form of a plate, erionite, mordenite acicular or fibrous, phillipsite and boiling Danshuang Jing Hui common. Pure various zeolites are colorless or white, but may be due to a variety of light-colored impurities and mixing. Shiny glass. Cleavage varies with the crystal structure. Mohs hardness medium. The proportion ranged from 2.0 to 2.3, containing barium is up from 2.5 to 2.8. zeolite molecular sieve formed in the epithermal stage, common in extrusive rock pores, also found in hydrothermal deposits and the modern spa deposition. The zeolite may be the action of water by diafiltration to exchange cations, the ingredients sodium, calcium ions can be exchanged with an aqueous solution of potassium and magnesium ions to soften hard water industry. The crystal structure of the zeolite comprises silicon (Al) oxy connected into a three-dimensional tetrahedral framework, grid has a variety of different sizes of holes and channels with large open. Alkali metal or alkaline earth metal ions and water molecules are located in the holes and channels, to contact grid is weak. Different ion exchange on the zeolite structure has little effect, but the nature of the 4a zeolite powder so that change. Present in the crystal lattice of different size cavities, can absorb or filter elements of different sizes other substances. Industrially often as a molecular sieve, to purify or separate components of the mixed material, such as gas separation, oil purification, treatment of industrial pollution.

Molecular sieve functions and features

The porous material has been widely used in many fields, such as the main catalytic microporous molecular sieve material, adsorption and ion exchange material separation materials plays an increasingly important role in oil processing, petrochemicals, fine chemicals, and household chemicals .
Molecular sieves (also known as a synthetic zeolite) is a microporous aluminosilicate crystalline silicon. It is made of silicon oxide, aluminum oxide tetrahedra basic skeleton structure, there is a metal cation in the crystal lattice (such as Na +, K +, Ca2 +, Li +, etc.), in order to balance the negative charge excess crystals. According to their type of zeolite crystal structure is divided into: A type, X-type, Y type.
Zeolite relevant standards:
"3a molecular sieve" "4A molecular sieve" "5a molecular sieve and test methods" "13X molecular sieve"
"Water assay method static sieve" "sieve dynamic water assay method"
"Granular sieve size determination," "Determination of bulk density of molecular sieve" "sieve crush strength test method", "Standard Test Method for molecular sieve desiccant cooling systems with anti-wear performance," "Determination of dynamic zeolite adsorption of carbon dioxide."
"Industrial activated alumina," "air separation plant with activated alumina acceptance technical conditions"
(5) Pharmaceutical ---- silver zeolite antimicrobial agent.

Application of molecular sieves 4A

Detergent additives: 4A zeolite as a detergent additive main function is to produce calcium ion exchange water softening, remove dirt and prevent redeposition. zeolite 4a is currently applied on behalf of the largest builders of phosphorus and most mature product. 4A Zeolite replace sodium tripolyphosphate as detergent additives to solve the environmental pollution has a major role. 4A Zeolite forming agent can also be used soap, toothpaste friction agent.
Sewage: molecular sieves 4a can remove sewage NH3-N, and Pb2 +, Cu2 +, Zn2 + ,, Cd2 + and so on. Industry, agriculture, animal husbandry and aquatic civilian discharged wastewater containing ammonia nitrogen, not only endanger the survival of fish, in the farming environment pollution, and promote algae growth, leading to blockage of rivers and lakes. molecular sieves 4a due to high selectivity of NH4 + exchangeable, has been successfully applied in the field. Sewage from metal mines, smelters, metal surface treatment and chemical emissions from industry and other sectors, which contains heavy metal ions harmful to human health. 4A molecular sieves with sewage in addition to those qualified to ensure the water quality, but also the recovery of heavy metals.
Other uses:
(1) Water ---- hard water softener, can replace the current widespread use of sulfonated coal, thereby reducing costs;
(2) Metallurgical Industry ---- separating agent, separation, extraction of brine potassium, rubidium, and cesium. In industry for the enrichment, separation and extraction of metals and other processes;
(3) petrochemical industry ---- catalysts, desiccants, adsorbents;
(4) ---- agricultural soil conditioner;
(5) Pharmaceutical ---- silver zeolite antimicrobial agent.