Ion-exchange properties of molecular sieves 4A

4a zeolite powder ion exchange properties, take advantage of this capability to soften water. 4a zeolite molecular sieves framework are each oxygen atom is shared by two adjacent tetrahedra, this structure which may be occupied by cations and water molecules large bugholes, and these cations and water molecules have a greater mobility can cation exchange and reversible dehydration. 4A zeolite is ion exchange with aluminum ions in the framework carried a negative charge carried by each of the aluminum ions, may be not only sodium ions, may also be combined with other cations. Calcium and magnesium ions can enter the original sodium ions occupy a large crystal cave, the 4A Zeolite replace sodium ions 4A Zeolite down ---- that sodium ions can be exchanged with hard water Ca2 + ,, Mg2 + ions exchange, so as to achieve the purpose to soften water.
Combined with calcium and magnesium ions in zeolite 4A speed slower than sodium tripolyphosphate, and with the ability to bind magnesium ions is weak. But 4A molecular sieve can be a small amount of water in harmful heavy metal ions (such as Pb2 +, Cd2 +, Hg2 +) can be very easily and quickly removed to purify water has very important significance.

Molecular sieve desiccant

Aluminosilicate compound having a cubic lattice, is mainly composed of silicon aluminum attached through an oxygen bridge consisting of the open framework structure, there are a lot of uniform pore size and neat in pore structure, large surface area of the inner hole. It also contains a low price and a larger ionic radius of metal ions and the chemical form of water. Since the water molecules in the continuous loss of heat, but the same crystal framework structure, the formation of many of the same size of the cavity, the cavity there are many of the same diameter connected pores, the diameter of these small pores of uniform size, pore ratio can diameter smaller molecules adsorbed into the interior of the cavity in the past, and the ratio of pores too large molecular exclusion, and thus able to molecular diameter different shapes, different degree of polarity of the molecule, the boiling point of different molecules, the different degree of saturation of psa oxygen generator molecular sieve supplier separation open, that has the effect of "screening" elements, so called regeneration of molecular sieves  Currently zeolite widely used in the metallurgical, chemical, electronics, petrochemical and natural gas industries

Pore ​​Zeolites

Pore ​​zeolite molecular sieve research progress in the synthesis and application of the latest, also summarizes the different synthetic zeolite powder suppliers  ynthesis system, compare the advantages and disadvantages of different full lines indicate the presence of the force assembled in common is the presence of the interface between the organic and inorganic phases . Depending on the type of interface force general synthetic route will be divided into three categories, and noted that the same type of interface force, modulating their relative size also can develop into different synthetic routes. Mesoporous summary of research results in skeletal structure, composition, morphology and pore size, etc., summarizes the different treatment methods modified mesoporous molecular sieves.

Introduction of Zeolite

molecular sieve is a cubic lattice of an aluminosilicate compound having. Molecular sieve has a uniform porous structure, the diameter of its pores of uniform size, these cavities can adsorb molecules smaller diameter than the internal bore, and an unsaturated polar molecules and molecules having a preferential adsorption capacity, and thus able to very different degree, different degree of saturation, and boiling points of different molecular sizes of different molecules separated, that has the effect of "screening" elements, so called zeochem molecular sieves  Since the molecular sieves have a high adsorption capacity, high thermal stability other adsorbents that are not so widely applied molecular sieve.
In the field of biological macromolecules, a common bio-rad SEC sieve prepacked columns.
US scientists have found that by adjusting the temperature, to precisely control one titanium silicate material pore size, to create a sophisticated molecular sieve. Some internal crystal material has a large number of uniform pore size smaller than the molecules can pass through the holes, while large molecules can not pass through, and thus serves to separate different molecules, such materials are known as air separate unit molecular sieve adsorbent.
In fact, in 2001, scientists in the UK "Nature" magazine reported that they had discovered a titanium silicate material known as ETS-4 can be used as a good molecular sieve. When the temperature rises, ETS-4 will gradually dehydrated, pore size decreases. Finely adjust the pore size in the use of this method, (1 angstrom equals one billion of a meter) in the 3-4 Angstroms range. Scientists say some common elements such as nitrogen, methane, oxygen, argon and water molecules are about the size of 3-4 Å, another is almost the same size, molecular sieves drying made with ETS-4 can effectively separate them. Researchers have experimented with ETS-4 from the nitrogen content in the mixture of nitrogen and methane, from 18% to 5%, and in the separation of argon and oxygen, nitrogen and oxygen experiments have been successful. It is believed that this technology will have important commercial applications

Application of Y zeolite

Shandong letter Tech as the largest molecular sieve base, specializing in the production of ZSM-5 zeolite, Y-type zeolite , Y zeolite manufacturers today to introduce the application of Y zeolite.
Structure of matter determines the performance, NaY zeolite relatively homogeneous, well-developed pore structure, after the ion exchange retention rich acid catalysis of proton acid sites make it possible. However, due to the high NaO NaY zeolite content, inhibits the normal role of proton acid sites, while NaY zeolite poor thermal stability, and only about 700 ~ C. So inevitably lead directly skeleton collapsed, losing developed a three-dimensional channel, terminate the catalytic reaction to proceed, it is generally reduced through the ion exchange skeleton Na0, ultra-stable process to improve the stability of the skeleton before use.
More ZSM-5 zeolite, Y zeolite information please pay attention to our letter of Shandong Qilu Hua Tech http://www.sdqlhx.com

Molecular sieve purification system air pressure fluctuations caused by water

Today, the largest of the ZSM-5 zeolite , Y zeolite base, to introduce a water purification system failure molecular sieve due to air pressure fluctuations caused by the following manufacturers to follow the molecular sieve with a look.
A company in ASU purging and testing process, there were two activated zeolite powders  ater purification system failure, molecular sieve purification system at the air inlet of the trap a lot of water spray. After analysis, found to be due to changes in air separation system operating pressure range is too big, one in the device during the cooling air distribution unreasonable blowing pipe valve operating too fast, too fast, the air pre-cooling system pressure fluctuations air flow entrainment lot of water purification systems to the molecular sieve. 2. Coupled with the purge job to constantly adjust the outlet valve opening sieve purification systems, air compressors and air lead after pre-cooling system pressure changed much, but not in time to monitor and control air pre-cooling system air pressure, so that the cooling water fleeing into the molecular sieve purification system.3. Meanwhile, the testing process air pre-cooling system is not put into operation interlock parking, ASU is not one of the reasons for the abnormal situation automatically interlock parking also in the event of failure.
In case of this fault, the electric heater can be improved by the outlet temperature setpoint 180 ℃ to 220 ℃, and the molecular sieve adsorber prolonged heating and blowing cold time. Adjusted ASU to resume normal operation.
More ZSM-5 zeolite, Y zeolite, and other related information

Low bulk patented invention than the original powder 4A Zeolite

Today Y zeolite manufacturers to introduce a low-pile than synthetic zeolite powder supplier  riginal patented invention. Interested friends may wish to look slightly!
A low bulk manufacturing process than the original powder of type 4A molecular sieves, type 4A molecular sieves for synthetic techniques, passes through the ingredients, slurry, crystallization, and the crystals were washed after separation in the system, characterized in that the sodium aluminate solution and industrial sodium silicate ingredients, slurry, crystallization reaction system control: 2.7 ~ 4.0Na2O · Al2O3 · 1.8 ~ 2.1 SiO2 · 110 ~ 170H2O. The present invention uses a sodium aluminate solution and sodium silicate hydrothermal synthesis method, by reducing the ratio of water and sodium, increase reactant concentrations synthesis system, a shorter crystallization time than small manufacturing a heap, a large adsorption capacity 4A molecular sieves original powder, and hard, smooth surface of the product, in the loading process, low dust, good flow properties, particularly suitable for insulating glass molecular sieve. Simple, low production cost, short production cycle, high solid content of products, high yield, achieve the desired purpose, to meet the performance requirements of the product.

Zeolite molecular sieve effect manufacturers for you to explain

5a zeolite powdere is a porous gel. Various molecular sieves have a range of pore size distribution, there is a maximum limit and minimum limit. The maximum pore diameter than the molecular diameter of the gel, will all be exclusion outside the gel particles, this situation is called a full-exclusion. Even if the full exclusion of two molecules of different sizes, can not have separation. Minimum pore diameter than the diameter of the gel small molecules can enter all pores of the gel. If two molecules can enter all the gel pores, even if their size difference, there will not be a good separation effect. Therefore, it must have a certain degree of molecular sieve range of use.
In summary, there are three cases in gel chromatography, one molecule is very small, can enter all of the zeolite 13x pores; the second is a large molecule, can not enter any of the gel pores; three molecules of moderate size , can enter within the pores of the gel pore size corresponding parts. Large, medium and small three molecules more readily separated from each other, but each gel isolated molecules outside the range, without changing the type of the gel is difficult to separate the cases. For molecules of different sizes, but the same is within the scope of the various gel isolated molecules, in the distribution of the gel bed is different: the larger molecules into the aperture only that part of the larger gel pores, and the molecule may enter more gel particles, such molecules larger movement distance is short, smaller molecules to move a long distance in the gel bed. So the larger molecules to smaller molecules through the gel bed and the rear through the gel bed, thus separating the molecular sieve can make use of different substances. Further, the gel itself has a three-dimensional network structure, when the large molecules through the pores in such a network structure on the greater resistance, resistance is small by small molecules. In adopting the gel bed, according to molecular size "queue, gels behave different molecular sieve effect size of various ingredients.

Zeolite molecular sieve effect manufacturers for you to explain

As the largest molecular sieve R & D base, Shandong Qilu Hua letter Hi-Tech Co., Ltd. specializes in producing a large number of high quality zeolite ZSM-5 , Y-type zeolite molecular sieves and other products. As a professional manufacturer, how can we tell you about the famous site of "molecular sieve effect" mean? Today, manufacturers would please listen to you explain what molecular sieve "vacuum pressure swing adsorption molecular sieve 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 smallest final outflows, a phenomenon called molecular sieve effect.

"Molecular sieve oxygen" Why questioned

Government Response

 Just equipment regardless of the product will change the status quo

 Faced with all walks of life to 93% oxygen questioned, the State Food and Drug Administration official told reporters that the presence of molecular sieve oxygen in the hospital as the country does have a file support.  As the regulatory authorities to do now is to strengthen supervision and standardize use.

 It is reported that the State Food and Drug Administration had 2003 Nianxia issued "on the management of medical oxygen notice."  Which provides that "medical molecular sieve pressure swing adsorption oxygen Preparation, its quality standards are being developed by the organization in the State Pharmacopoeia Commission, before the implementation of the standards promulgated, oxygen temporarily implementation of the method of preparation of drug approval number, also temporarily does not issue a "medical preparations license." But molecular sieve oxygen equipment must obtain "medical device registration permit", and must comply with YY / T0289-1998 ("molecular sieve oxygen medical equipment general technical specifications") requirements, the Provincial Food and Drug Administration for clinical use behind the record. " activated zeolite powders

 "But the key is so long, but it has not issued the relevant standards." The official said.

 Reporters interviewed the State Food and Drug Administration Medical Device Supervision Division Wangbao Ting.  Wangbao Ting said that previously did for medical supervision only to the molecular sieve oxygen equipment, and without regard to the product itself.  "But this situation will soon change."

王宝亭 demonstrate to reporters in the hands of a thick stack of material, said: "At present, China is being transformed ISO100832006" medical gas pipeline systems with an oxygen concentrator supply systems, "the pharmaceutical industry to international standards, my hand is submitted for approval items . "

 He said that after the approval of the implementation of this standard, the original equipment regardless of the status quo simply will change products, including products, including the entire system will be managed.

 As for the 93% oxygen "identity" issue, Wangbao Ting said regulators are considering now to 93% oxygen included in the "Chinese Pharmacopoeia" management, "but it will take some time."

王宝亭 said that the current regulators are stepping molecular sieve oxygen hospital with the supervision and inspection.  The first thorough investigation of medical institutions for medical molecular sieve oxygen equipment have not registered a license; the second is to maintain the use of molecular sieve oxygen equipment for medical check compliance with relevant regulations and standards; c is the concentration of oxygen in the molecular sieve oxygen equipment testing to production eligibility.  At present, the State Food and Drug Administration's six inspection teams were in the country are 18 provinces (autonomous regions and municipalities) to carry out supervision.

 News from the National Adverse Drug Reaction Monitoring Center also showed that after several expert meetings, the regulatory authorities are considering "further clarify the 93% oxygen for medical molecular sieve oxygen equipment prepared in the scope of clinical."

"Molecular sieve oxygen" Why questioned

99.5% of the data from the "Chinese Pharmacopoeia" provisions of the standard medical oxygen content of not less than 99.5 percent oxygen, a state compulsory standards.  The 90% figure is derived from the "medical molecular sieve oxygen equipment General technical specifications" (YY / T0289-1998) requirements.

 Skeptics claim that the same medical oxygen, why there are two different content standards?  A national mandatory standards, a technical standards, no doubt to the national mandatory standards should prevail.

 The "Identity treatment" of two different medical oxygen products, a raise questions of another reason.

 According to regulations, air separation production of low molecular weight Medical Oxygen implement drug approval number.  That is, if you want to produce medical oxygen, first to obtain Drug Administration drug production licenses issued by the department.

 A medical oxygen production business manager, said the company needs to produce medical oxygen drug GMP certification.  GMP certified medical oxygen content of up to 12 major items, 198 sub-items.

 The production of medical molecular sieve oxygen medical oxygen present there is no clear position.

 According to the State Food and Drug Administration related departments, the current medical molecular sieve oxygen equipment is included in the second category of medical equipment management, installation of equipment require approval and registration at the provincial level food and drug regulatory authorities.  "But for the use of medical oxygen products produced in this way, without a clear definition, neither the inclusion Drug Administration, also not included in the hospital preparation for management." The official said.

 Expert opinion

 As long as the standard operation, molecular sieve oxygen is safe

 93% oxygen incurred questioned why there is a reason to worry about the safety of this product.

 A medical oxygen production company CEOs, told reporters that medical oxygen production enterprises Medical Oxygen has a strict quality management system, while in the hospital just a few trained personnel to be responsible, in the absence of strict management standards, whether ensure the quality of the product?

 The official said that, in accordance with the requirements of enterprises for raw materials, medical oxygen - air, with strict quality requirements.  General requirements for Medical Oxygen enterprise built on the air, and the molecular sieve oxygen hospitals are required to make the best of the air, due to geographical location, special environment in which air quality is difficult to be guaranteed.

 93% oxygen for bad security, the National Drug Reaction Monitoring Center has held a forum of experts and demonstration.  Most recently in early July this year.

 Experts are more consistent view is that the current preparation of medical molecular sieve oxygen concentrator technology is a mature technology, as long as the standard operation, the molecular sieve oxygen safety is guaranteed.

 Participants of medical equipment management and clinical experts believe that the clinical use of oxygen generally use a lower concentration of oxygen (50% less), only the anesthesia, ICU (intensive care unit) may have different uses and oxygen concentration, so 93 % oxygen fully able to meet clinical needs.

 National Adverse Drug Reaction 5a zeolite molecular sieves Monitoring Center statistics show that from 2003 to 2009, the Center medical device adverse event database does not receive the 93% oxygen suspicious about the medical device adverse event reports.

 Statistics from the hospital showed, Beijing Armed Police General Hospital, Air Force General Hospital, Peking University First Hospital, Peking University Third Hospital, Beijing Tongren Hospital and other hospitals using molecular sieve equipment, has accumulated hundreds of thousands or even millions of Use Cases , did not show medical malpractice.

 But experts also suggested that the current 93% in our clinical use of oxygen should be clear, not general use.

 According to experts, the current in different countries for 93% oxygen international management measures vary, but generally have a limited range of use.  In the United States, 93 percent oxygen is included in the Pharmacopoeia for management, but must be explicitly specified hospital patients which used an oxygen; in Canada, 93% of oxygen is also approved for use in clinical practice, but only in the medical institutions in remote areas; in EU, 93% oxygen also been approved for clinical use, but has a more detailed provisions.

 One expert believes the PLA General Hospital, 13x zeolite molecular sieves first aid and oxygen hyperbaric chamber, oxygen concentration, the higher the better, and the low molecular sieve oxygen concentration, and therefore should be banned aid and hyperbaric oxygen 93% oxygen.

PSA nitrogen plant design basis

   Adsorption matrix for all types of adsorbents, such as: aluminum plastic, silicone, 3a zeolite molecular sieves activated carbon and molecular sieves.  Among PSA nitrogen means they use various types of molecular sieve adsorbents (zeolites, carbon molecular sieves), various types of molecular sieves have specific selective adsorption, such as nitrogen is often used 3A carbon molecular sieve oxygen, and adsorption H20, C02 multi-use 13X zeolites.  PSA Nitrogen Generator works: clean pressurized air (oxygen and nitrogen mixed gas) through some sort of carbon molecular sieve, most of the remaining traces of oxygen and water is a molecular sieve adsorption, adsorption of nitrogen is unable to be discharged This nitrogen adsorption stage.   While reducing the pressure to atmospheric or subatmospheric pressure, the adsorption capacity of the molecular sieve oxygen decreased oxygen which is resolved in a compressed state of the adsorbed water and the regeneration is parsed (oxygen) phase.  Molecular sieves can be parsed and nitrogen adsorption phase of the next cycle, the cycle is repeated to obtain a certain purity of nitrogen, while some of the purity of the oxygen enriched air. 

Hospital inspection identified three focus on molecular sieve oxygen

Health News (Reporter Wang Lemin) July 25, the State Food and Drug Administration held a national medical molecular sieve oxygen equipment special inspection group working conference in Beijing. The meeting identified the key elements of this inspection work. State Food and Drug Administration Medical Device Division Wangbao Ting said the focus of the inspection focused on three aspects: First, check the medical institutions for medical activated zeolite molecular sieve oxygen equipment have not registered a license, the second is to check the medical molecular sieve system maintenance of oxygen equipment, the use of compliance with relevant regulations and standards, is sampling and testing equipment produced three oxygen concentration is qualified. April this year, the State Food and Drug Administraactivated zeolite sieve oxygen equipment. After the meeting, six inspection teams to Beijing, Jiangsu, Zhejiang, Shandong and other 18 provinces (autonomous regions and municipalities) to carry out a 10-day inspection.

tion launched a medical institution medical molecular sieve oxygen equipment special inspection. Medical institutions around the self, food and drug regulatory departments of medical institutions were random. The previous phase of this inspection is intended to further promote special inspection work to further standardize and improve the safety level of protection of medical

Structure

Thus proteoglycan aggregates composed of coiled turns, forming a sieve-like microporous structure, called molecular sieves. Zeolite molecular sieve allowing only its micro-pores is less than the material molecular sieve separation through its pores large macromolecules, the bacteria has a barrier function. The matrix becomes the limiting diffusion of bacteria and other harmful substances defensive barrier. Hemolytic streptococcus and cancer cells can produce hyaluronidase, decomposition proteoglycan matrix structure damage, to be spread. The proteoglycan aggregates molecular sieve adsorbent further combined with a plurality of hydrophilic groups capable of binding to a large number of water molecules, forming extracellular "reservoirs."

zeolite molecular sieves

Zeolite adsorption has two characteristics: (1) the center of the polarity on the surface of a Lewis strong; (2) the zeolite cages or channels in small size, which makes the strong molecular sieve siliporite gravitational field. Therefore, the adsorption capacity of the adsorbate molecules is much more than other types of adsorbent. Even adsorbate partial pressure (or concentration) is low, the adsorption capacity is still considerable. Zeolite adsorption separation not only the size and shape of 4a zeolite powder the adsorbate molecules, but also on its polarity, and therefore, the zeolite molecular sieves can also be used to separate substances of similar size.

zeolite molecular sieves the gap with foreign countries is growing

zeolite molecular sieves the gap with foreign countries is growing. 1970s was the heyday of PSA oxygen air separation technology development, there are more than a dozen units have carried out  synthetic zeolite powder supplier experimental research PSA oxygen technology, the establishment of a number of sets of industrial test equipment. During this period the development of PSA oxygen equipment common in the following areas:
they use a higher than atmospheric grace molecular sieves  pressure adsorption, desorption atmospheric processes, adsorption tower has two to four;
 before the air enters the adsorber, after dehydration pretreatment;
Poor (3) equipment reliability, not continuous and stable operation, resulting in most of the equipment scrapped;
 technical, economic indicators lag behind.
1980s, the original PSA oxygen equipment in research and development unit of development projects have been suspended, the development of technology, PSA oxygen into the trough again.

activated molecular sieves air filter contaminated air through

activated molecular sieves Micro fan inside the machine (also known as ventilator) indoor air circulation, molecular sieves 13x air filter contaminated air through the machine inside (two filters) will remove a variety of contaminants or adsorption, and then after installed in the outlet of the negative ion generator 4a zeolite molecular sieves (when working in high-pressure ion generator to generate negative high voltage direct current), will continue to air ionization, a large amount of negative ions, being sent out micro fans, form negative ions flow, to clean and purify the air of purpose, thus provide people with a similar nature in the fresh air "micro climate."

The principle is the use of industrial oxygen air separation technology

The principle is the use of industrial oxygen air separation technology,first, a high density compressed air to the condensation point of the air in the re-use of the components is different so air separate unit molecular sieve  that in the gas and liquid from a certain temperature,activated molecular sieves and further distillation derived; home oxygen works: the use of molecular sieve physical adsorption and desorption techniques. molecular sieves 4a  Filling the molecular sieve oxygen generator can be adsorbed nitrogen pressurized air, the remaining oxygen is not absorbed is collected, after purification was turned into high-purity oxygen.

4a zeolite at 110 ° C ambient temperature drying Can be activated

4A, can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene and other low molecular weight compounds as pore molecular sieve 4A, air separate unit molecular sieve does not activated molecular sieves adsorb any molecular diameter greater than 4A (including propane), a high selectivity for water adsorption properties any other molecule, is one of the varieties of industrial zeolite largest amount. 110 ° C for water evaporation is a large space, but it is impossible to zeolite pore water rush out. Therefore, generally zeochem molecular sieves used in a laboratory muffle furnace dehydrated drying can be activated at a temperature of 350 ° C, dried 8 hours at atmospheric pressure (if the vacuum pump can be dried for 5 hours at 150 ° C in the case of the exhaust). The activated molecular sieve in air cooled to 200 ° C (about 2 minutes) and immediately stored in a desiccator. If the conditions applied during the cooling and preservation of dry nitrogen to prevent moisture in the air is absorbed again. Old post contaminants using molecular sieve, activated not only when the temperature of 450 ° C up to, but also to pass into the steam or inert gas (nitrogen) to replace sieve out the other substances.

activated zeolite Activated Zeolite is a natural zeolite

Activated Zeolite is a natural zeolite is made through a variety of special activation process, activated zeolite powder the adsorption performance stronger than the natural zeolite, ion exchange performance is also better, not only to remove the water turbidity, color, odor, and harmful heavy metals in water, such as: chromium, cadmium nickel, zinc, mercury, iron ions and organic: phenol, BHC, DDT, three nitrogen, ammonia nitrogen, phosphate ions activated alumina and other substances with adsorption exchange interaction, but also conducive to all kinds of micro-pollutants removal and flooding fluid does not contain toxic, harmful substances, removal of iron, fluorine effect is more significant. So the ideal filter activated zeolite is a new industrial water supply, wastewater treatment and water filtration.

activated molecular sieves Structure

Zeolitic molecular sieves known as synthetic zeolites or molecular sieves having a chemical composition formula is:
[M2 (Ⅰ) M (Ⅱ)] O.Al2O3.nSiO2. MH2O
Formula M2 (Ⅰ) and M (Ⅱ) respectively monovalent and divalent metal ions, most of the sodium and calcium, n is called silica to alumina ratio of the zeolite, sodium silicate and silicon mainly from silica, aluminum comes from sodium aluminum and Al (HO) 3, etc., which react with aqueous sodium hydroxide colloid was prepared and dried after a zeolite, activated alumina typically n = 2 ~ 10, m = 0 ~ 9.
Characteristics of the zeolite molecular sieve having a role, it has a uniform pore size, such as 3A0,4A0,5A0,10A0 pores. There 4A0 4A0 pore zeolite adsorption of methane, ethane, and not more than three carbon adsorption of n-alkanes. It has been widely used for activated alumina drying agent  gas adsorption separation, drying, and gas and liquid separation are different alkanes.
Thus proteoglycan aggregates composed of coiled turns, forming a sieve-like microporous structure, called molecular sieves. Zeolite molecular sieve allowing only its micro-pores is less than the material through its pores large macromolecules, the bacteria has a barrier function.

Specific applications of activated sieves

Activate sieves is one of the main material of volatile organic compounds in the physical adsorption method used in processing. But if not completely degrade pollutants, easy to produce secondary pollution.regeneration of molecular sieves in order to solve the problem of light pollution, activated sieves humans began to think of ways to use technology to replace traditional catalytic degradation purification technology, activated sieves Photocatalytic treatment technologies emerged. This method is based dioxide as a catalyst, activating sieves method using photocatalytic oxidative degradation of volatile organic compounds in the air, molecular sieve grace no other chemical additives, mild reaction conditions, and the final product is usually only carbon dioxide and water, will not be activated sieves produce secondary pollution.

The practical application of zeolite sieves molecular activation

Zeolite sieves molecular activation is emptying device for PSA oxygen concentrator,zeolite sieves molecular activation including two adsorption towers, zeolite sieves molecular activation is two is arranged in the adsorption tower below theelectromagnetic valve, 3a zeolite molecular sieves vent duct activated zeolite powder, zeolite sieves molecules to activate the vent valve and a vacuum pump; the vent duct is connected to one end ofthe two electromagnetic valve are respectively used in pipeline, zeolite sieves molecular activation two the electromagnetic valve is connected to the other end ofthe pipe is respectively for the adsorption tower; zeolite sieves molecular activation of the vent pipe are connected by pipeline are respectively connected to the vent valveend and one end of the zeolite powder. synthetic zeolite powders the other end of the other end ofthe activation of sieves vent valve and the vacuum pump is connected with a muffler.Activated zeolite powder by the technical proposal, the utility model by adsorption venttower in the add a vent valve, the device switches vent pre vent valve open, zeolitesieves molecular activation by the adsorption tower pressure difference inside and outside the internal exhaust gas vent part, zeolite sieves molecular activation of remaining gas use the vacuum pump; reduce shortens working period of vacuum pumps, vacuum pump load, prolong the service life of vacuum pump.

The practical significance of zeolite molecular sieves

zeolite molecular sieves has high adsorption capacity of zeolite molecular sieve, strong stability and other adsorbents no merit, the molecular sieve to obtain a wide range of applications. Zeolite molecular sieve in the field of biological macromolecules, zeolite molecular sieve are common activated zeolite powder pre column zeolite molecular sieve by adjusting temperature, zeolite molecular sieve can precisely control the size of a titanium silicate material, activated alumina manufactured aluminophosphate molecular sieve. Zeolite molecular sieve some crystal material has a large number of uniform pores,zeolite molecular sieves molecular activated alumina desiccent size than the small hole can pass through, and large molecules cannot pass through, so you can play the separation of different molecular interaction, activated alumina, activated zeolite powder this class of materials known asmolecular sieve. In fact,activated molecular sieves they found that a substance called activated alumina can be used as a good molecular sieve. When the temperature rises, the activated aluminadesiccent will gradually dehydrate, activated alumina desiccent micropore sizedecreases. Zeolite molecular sieve by using this method, you can fine tune the pore size range.

The practical application of zeolite molecular sieves activation

Zeolite sieves molecular activation is amino three acetate and sodium carbonate,zeolite sieves molecular activation is trimeric sodium phosphate and sodium sulfate,zeolite molecular sieves synthesis of sieves zeolite molecular properties for the regeneration of of in the production of high concentrated laundry powder agglomeration forming added more surface active agent, regeneration of molecular sieves washing and good fluidityare very meaningful. zeolite molecular sieves Through the experiment, the synthesis of zeolite powder liquid carrying amount of more than 30%, molecular sieves regeneration of of in theproduction of washing powder is added during the synthesis of zeolite molecular sieves, design can increase the material flow,zeolite molecular sieves the design of molecular sieves preparedto adjust viscosity, appearance of the product desiccant molecular sieve liquidity and anti caking ability a good product. Zeolite sieves molecular activation: through the experiment on the same formula containing different additives, zeolite molecular sieves change agentcompares the detergency, activated molecular sieves found that the polymer decontamination effect with 40% molecules of STPP, activated zeolite powder 20% 20% of the screen, 4% equivalent to STPP,zeolite molecular sieves zeolite molecularsieves molecular activation molecules in the non phosphorus formula in 20% to join the 10% sieve in carbonate sodium and 4.5% of the polymer, can get the detergencyof ideal products.