Place of Origin: | China |
Certification: | ISO9001:2015 |
Model Number: | DG1/8" |
Minimum Order Quantity: | Negotiation |
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Price: | Negotiable |
Packaging Details: | 25 kg / kraft paper bag, 100 kg / large bag 150 kg / sealed iron drum |
Delivery Time: | Negotiable |
Payment Terms: | L/C;T/T |
Supply Ability: | 6000 ton/year |
Product Name: | DG1/16" 4A Molecular Sieve Desiccant | Classification: | Chemical Auxiliary Agent |
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CAS: | 1318-02-1 | MF: | Na2O . Al2O3 . 2SiO2 . 4.5H2O |
Purity: | 99% | Usage: | Petroleum Additives, Water Treatment Chemicals |
Model Number: | 4A | Advantage: | Strong Adsorption Capacity, High Strength |
Diameter: | 1.5-2.0mm | ||
High Light: | DG1/16" 4A Molecular Sieve Desiccant,Strong adsorption Molecular Sieve Desiccant,1/16" molecular sieve 4a |
Strong Adsorption DG1/16" 4A Molecular Sieve Desiccant
Product introduction
Molecular sieve also called zeolite, is a crystalline aluminum silicate. Its crystal structure has neat and uniform channel, aperture around a molecular level, molecular sieve only allows smaller diameter than its aperture into it, so it can sieve molecules according to their size in the mixture, so it called molecular sieve. According to molecular sieve aperture size, there are 3A, 4A, 5A, 10X, 13X. 4A molecular sieve is Na-A molecular sieve, aperture 0.4nm; if Na replaced by K, aperture 0.3nm, is 3A molecular sieve; if over 1/3 Na replaced by Ca2+, aperture 0.5nm, is 5A molecular sieve.
4A Molecular Sieve is a kind of synthetic, with micropore cubic lattice of alkali metal aluminosilicate salt. It also called Sodium A molecular sieve, its structure is similar to NaCl. Due to its effective pore diameter is 0.4nm, so it is called 4A molecular sieve, its space network structure is staggered by silicon-oxygen tetrahedron (SiO4) and aluminium-oxygen tetrahedron (AlO4). 4A molecular sieve decides the adsorption order according to the polarity of different molecules, adsorbs only those with a molecular diameter of less than 4A. For small polar molecules and unsaturated molecules, the greater polarity, the higher degree of unsaturation, the stronger of selective absorption.
In the skeleton of 4A molecular sieve each oxygen atom is shared by two adjacent tetrahedrons, these structures formed a large crystal cave, positive ions and water molecules can be exchanged and reversible dehydration in the crystal cave. The ion-exchange of 4A molecular sieves is in crystals which have aluminium ions, each of aluminum ions with a negative charge, which can be combined with cations such as sodium, calcium and magnesium. Calcium ions and magnesium ions can replace sodium ions and enter crystal caves which were occupied by the sodium ions. It shows that sodium ions can be exchanged by Ca2+, Mg2+ ions in hard water, so 4A molecular sieve can soften water. 4A molecular sieve also can remove a small amount harmful heavy metal ions (such as Pb2+, Cd2+, Hg2+) in water, it is very important for purifying water.
4A molecular sieve adsorbs those substances which molecular diameter is less than 4A, such as water methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, ethane, propylene, ammonia, doesn’t adsorb molecules which diameter are greater than 4A (include propane), the selective adsorption performance to water than any other molecules.
4A molecular sieve technical Index:
Index Item | Unit | Technical index | |||
Shape | DG1/16" | DG1/8" | 4×8 mesh | 10×20 mesh | |
Diameter | mm | 1.5-2.0 | 3.0-3.5 | 3.6-4.8 | 1.2-2.0 |
Size ratio up to grade | % | ≥98 | ≥98 | ≥96 | ≥96 |
Bulk density | g/ml | ≥0.64 | ≥0.64 | ≥0.65 | ≤0.80 |
Wear rate | % | ≤0.20 | ≤0.25 | ≤0.25 | ≤0.25 |
Crushing strength | N | ≥27 | ≥62 | ≥71 | |
Static water adsorption | % | ≥21 | ≥21 | ≥21 | ≥21 |
Package water content | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
Scope of application
a) Drying and removing of CO2 from natural gas, LPG, air, inert and atmospheric gases, etc.
b) Removal of hydrocarbons, ammonia and methanol from gas streams (ammonia syn gas treating)
c) Special types are used in the air break units of buses, trucks and locomotives.
d) Packed in small bags, it may be used simply as a packaging desiccant
Common model
Molecular sieve models commonly used in the gas industry;
Type A: Potassium A (3A), Sodium A (4A), Calcium A (5A), Type X: Calcium X (10X), Sodium X (13X)
Type Y: Sodium Y, Calcium Y
Product Pictures
Product Features
1. Adsorption is selective.
⑴ Choose the adsorption according to the different molecular diameter.
⑵ Select the adsorption according to the polarity of the molecule.
⑶ Selective adsorption according to the degree of molecular unsaturation.
⑷ Select adsorption according to different boiling points.
2. It has low concentration and high adsorption characteristics at higher temperature.
3. Cation exchange characteristics.
4. Catalytic properties.
⑴ The heterogeneous catalytic reaction is carried out on the surface of the catalyst. When the molecular sieve is used as a catalyst or carrier, the catalytic reaction is to catalyze the substances entering the micropores of the molecular sieve.
⑵ Only produce products whose molecules are smaller than the pores of the molecular sieve.
⑶ Because of the large surface area, it has high activity.
⑷ Strong resistance to poisoning and high thermal stability.
⑸ When used as a carrier, the metal catalyst can be evenly distributed on the inner surface of the molecular sieve, so it is easy to prepare a catalyst with good repeatability.
Factory information
Shanghai Xuefeng Molecular Sieve Co., Ltd. adopts the most advanced and fully automated assembly line molecular sieve production technology in China, and has positions for dosing, kneading, extrusion, drying, roasting and packaging. The main equipment includes pelletizing machine, hardening cylinder, kneader, extruder, belt dryer, rotary roasting furnace, vibrating screen, scale and other ancillary facilities. The production process parameters are all automatically controlled, and there is no paper recorder attached. , The results of the process parameters are comprehensively recorded, and at the same time, the operators of each position shall manually record the parameters every hour to ensure the traceability of the operation process. At the same time, the company pays attention to the inspection of intermediate products, and has set up sampling points for intermediate products in the ingredients, extrusion molding, and drying positions to ensure that the intermediate products meet the specified quality requirements.
Contact Person: Qiao
Tel: +8615038006622
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