Molecular Sieve is a highly porous substance that is widely used in the adsorption and separation processes of gases and liquids. The characteristic of these porous materials is that their pore sizes are very consistent, allowing them to selectively adsorb molecules of specific sizes, just like a sieve, hence the name "molecular sieve". The basic framework of molecular sieves is usually composed of silicates (silicon, oxygen) or aluminosilicates (aluminum, silicon, oxygen). Their corresponding pore sizes can range from 2 angstroms to 10 angstroms, which can cope with various adsorption needs.
Main Features:
1. Strong adsorption selectivity: This is because the pore size of the molecular sieve is neat and uniform, and it is also an ionic adsorbent. Therefore, it can selectively adsorb according to the size and polarity of the molecule. If it can effectively remove ethylene from saturated hydrocarbons, it can also effectively remove acetylene from ethylene, which is determined by its strong polarity.
2. Strong adsorption capacity. Even if the composition of the gas is very low, it still has the adsorption capacity. 3. There is still a large adsorption capacity at higher temperatures, while other adsorbents are greatly affected by temperature, so the adsorption capacity of the molecular sieve is large under the same temperature conditions. Because of the above advantages, molecular sieves have become a very good adsorbent, widely used in the production of basic organic chemicals and petrochemicals. They are also commonly used in the treatment of harmful gases, SO2, NOx, CO, CO2, NH3, CCl4. , purification of water vapor and gaseous hydrocarbon waste gas;
4, high temperature regeneration, high regeneration efficiency and high safety.
The use of shaped molecular sieves as adsorbents for exhaust gas treatment will become mainstream. The process of using molecular sieves as a carrier has been widely used abroad. The molecular sieve can be designed and applied according to the concentration of the pollutants and the particle size. After the molecular sieve adsorption and concentration, the concentration of the pollutants can be several times to several tens of times. The concentrated exhaust gas can be condensed and recovered or burned as needed.
|
|
|
Model
|
3A Molecular Sieve
|
4A Molecular Sieve
|
5A Molecular Sieve
|
13X Molecular Sieve
|
|
Nominal pore diameter
|
3 angstroms
|
4 angstroms
|
5 angstroms
|
10 angstroms
|
|
Diameter
|
1.7-2.5 (mm)
|
3.0-5.0 (mm)
|
1.7-2.5 (mm)
|
3.0-5.0 (mm)
|
1.7-2.5 (mm)
|
3.0-5.0 (mm)
|
1.7-2.5 (mm)
|
3.0-5.0 (mm)
|
|
8*12 (mesh)
|
4*8 (mesh)
|
8*12 (mesh)
|
4*8 (mesh)
|
8*12 (mesh)
|
4*8 (mesh)
|
8*12 (mesh)
|
4*8 (mesh)
|
|
Bulk density (g/ml)
|
≥0.70
|
≥0.70
|
≥0.70
|
≥0.70
|
≥0.66
|
≥0.66
|
≥0.66
|
≥0.66
|
|
Crushing strength (N/PC)
|
≥55.0
|
≥85.0
|
≥35.0
|
≥80.0
|
≥30.0
|
≥70.0
|
≥25.0
|
≥80.0
|
|
Static H2O adsorption (%)
|
≥21.0
|
≥21.0
|
≥21.5
|
≥21.5
|
≥21.5
|
≥21.5
|
≥25
|
≥25
|
|
Wear ratio (%)
|
≤0.25
|
≤0.25
|
≤0.40
|
≤0.40
|
≤0.20
|
≤0.20
|
≤0.20
|
≤0.20
|
3A zeolite molecular sieve
3A molecular sieve has many advantages. It has consistently high absorption rates, strong crush strength, and high resistance to contamination, resulting in increased cycle times and therefore longer product life. For these reasons, it has become one of the most reliable desiccants and is commonly used in the following applications: 1. Freeze drying 2. Natural gas drying 3. Moisture removal from paint or PU plastic 4. Dry cracked gas 5. Static drying of insulating air or gas-filled glass installations 6. Dehydration of highly polar compounds such as methanol and ethanol 7. Dehydration of unsaturated hydrocarbons (such as ethylene, propylene, butadiene) Molecular sieve 3A can also be regenerated and reused by removing absorbed moisture and other materials and then heating it to 250 degrees Fahrenheit. Then store the sieve in an airtight container until ready to use again to avoid accidental moisture absorption.
4A zeolite molecular sieve
The 4A molecular sieve has an Angstrom size of 4, so any molecules larger than 4A cannot be absorbed. 4 Angstroms is the form of sodium known as the A-type crystal structure, with the following order of absorbance: argon, krypton, xenon, ammonia, carbon monoxide, C2H4, C2H2, CH3OH, C2H5OH, CH3CN2, CS2, CH3CL, CH3Br, and carbon dioxide. Also used in the following applications: 1. Freeze drying 2. Natural gas drying 3. Moisture removal from paint or PU plastic 4. Dry cracked gas 5. Static drying of insulating air or gas-filled glass installations 6. Dehydration of highly polar compounds such as methanol and ethanol 7. Dehydration of unsaturated hydrocarbons (such as ethylene, propylene, butadiene) Like the 3A sieve, the Type 4A sieve can be reused and regenerated. First, you need to remove the absorbed moisture and other materials, then heat it to 250 to 450 degrees Fahrenheit. Then store the sieve in an airtight container until ready to use again to avoid accidental moisture absorption
5A zeolite molecular sieve
The 5A molecular sieve has a pore size of 5 Angstroms, which means it cannot absorb molecules smaller than 5A. This type is an alkali metal aluminosilicate with a type A crystal structure. This means it will separate normal and isoparaffins, co-absorption of moisture and carbon dioxide, and pressure swing absorption (PSA) of various gases. The adsorption rate of 5A sieve is: C3-C14, C2H5CL, C2H5Br, CH3L, C2H5NH2, CH2CL2CH2Br2, CHF2CL, CHF3, CF4, (CH3)NH2, B2H6CF2CL2, CHFCL2, CF3CL. Sieve Type 5A is a reliable desiccant suitable for the following applications: 1. Normal paraffin separation process 2. Oxygen/Hydrogen PSA (Pressure Swing Adsorption) Process 3. SF6 refrigerant for power refining (moisture and hydrocarbon removal)
13X zeolite molecular sieve
Molecular Sieve 13X is the sodium form of the type X crystal and has a much larger pore opening than the type A crystals. It will adsorb molecules with a kinetic diameter of less than 9 Angstrom (0.9 nm) and exclude those larger.
It also has the highest theoretical capacity of the common adsorbents and very good mass transfer rates. It can remove impurities too large to fit into a type A crystal and is commonly used to separate nitrogen from oxygen.
Application
Removal of CO2 and moisture from air (air pre-purification) and other gases.
Separation of enriched oxygen from air.
Removal of mercaptans and hydrogen sulphide from natural gas.
Removal of mercaptans and hydrpogen sulphide from hydrocarbon liquid streams (LPG, butane, propane etc.)
Catalyst protection, removal of oxygenates from hydrocarbons (olefin streams).
Production of bulk oxygen in PSA units .
Production of medical oxygen in small scale oxygen concentrators
Regeneration:
Molecular sieve Type 13X can be regenerated by either heating in the case of thermal swing processes; or by lowering the pressure
in the case of pressure swing processes.
To remove moisture from a 13X molecular sieve, a temperature of 250-300°C is required. A properly regenerated molecular sieve can
give moisture dew points below -100°C, or mercaptan or CO2 levels below 2 ppm.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process
Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
13X APG zeolite molecular sieve
Type 13X APG molecular sieve is specially designed to co-absorb CO2 and H2O for air cryo-separation industry. It has largeer capacity and faster adsorption speed for removal of CO2 and H2O to prevent the bed gelation, it is suitable for any air cryo-separation plants of any size and any types in the world.
Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
XH-5 zeolite molecular sieve
The pore size of XH-5 molecular sieve crystal is about 4Å (0.4 nm), and it is mainly used for drying and purifying R12 and R22 refrigerants, and drying automotive air systems, including the removal of moisture in automotive air conditioning systems and air brake systems.
XH-7 zeolite molecular sieve
The pore size of XH-7 molecular sieve crystal is about 3Å (0.3 nm), which is suitable for dehydration and drying of new refrigerant R-139a for refrigerators, freezers, and air conditioners, and special refrigerants such as butane.
XH-9 zeolite molecular sieve
The pore size of XH-9 molecular sieve crystal is about 3Å (0.3 nm), which is suitable for the drying of various refrigerants (except mixed refrigerants containing difluoromethane), and the dehydration and drying of new refrigerants in refrigerators, freezers and air conditioners. It is a general-purpose desiccant.
we warmly welcome you to explore our products and services! We are a professional manufacturer specializing in the production, research and development, and sales of activated carbon products, including columnar activated carbon, powdered activated carbon, granular activated carbon, and coal-based activated carbon; catalytic carbon; palladium carbon, ruthenium carbon, and platinum carbon. As an integrated company, we are committed to providing you with the best solutions for your needs.
To demonstrate our confidence in the quality of our products, we are pleased to offer free samples for your evaluation. Please give us the opportunity to serve you and fulfill your requirements with our exceptional products and services.
Q1: Are you a trading company or a manufacturer?
We are a direct manufacturer of water treatment materials (activated carbon, PAC, PAM, etc.). We have 20 years of experience in this industry and are an industry leader.
Q2: How to save costs?
We are a direct factory, there is no middleman to earn the difference;
-If the quantity you need is small, we have it in stock. Since it is the first cooperation, we will give you the greatest discount;
-If you need a large quantity, we will prepare raw materials in advance to avoid rising costs due to fluctuations in raw material prices;
-We have our own logistics partners, whether it is FOB or CIF, we have our own advantages in cargo transportation;
Q3: What is your MOQ?
Generally it is 1000 kg. Any trial orders smaller than MOQ are warmly welcomed. If you have a sample order, please feel free to contact us (samples are free for you, and the shipping costs are borne by you.), so that we can provide you with some shipping suggestions according to the quantity you need to save costs.
Q4: What is your general delivery time?
Usually 2-7 working days (for ready-made samples) and 7-15 working days (for bulk orders).
Q5: How to ensure product quality?
We can provide you with samples for your use test or component test;
-We have a full set of product certification certificates, which are tested and certified by authoritative organizations, so that you can purchase with confidence;
-There will be a factory inspection report for the batch of products when the product leaves the factory;
-The product will undergo 3 QC inspections during customs declaration;
Q6: What are your advantages?
-100% manufacturer, your professional and trusted supplier of water treatment materials.
-Any offer will be taken seriously.
-Good suggestions and suggestions for the products you want will be provided when needed.
-High quality and best ex-factory price.
-Strict management and quality control system
-Delivery is guaranteed.
Audited Supplier 
){kind=link}
){kind=link}