Water Absorbing 4*8 Mesh 3.6mm 4A Molecular Sieve Desiccant

Water Absorbing 4*8 Mesh 3.6mm 4A Molecular Sieve Desiccant

Product description

The 4A molecular sieve adsorbent has a 4 angstrom (4A) pore size; this means that any molecule that is larger than the 4 angstrom pores will not be adsorbed. The 4A molecular sieve is composed of the sodium type of A crystalline structure. For a 4A molecular sieve, the sequence rate that adsorption occurs is Ar, Kr, Xe, NH3, CO, CO2, C2H2, CH3Br, C2H4, CH3OH, CH3CN2, CS2, and CH3CL.

Due to the crystalline structure, molecular sieves that have a 4 angstrom pore size have a very high rate of adsorption and properties—including an increased resistance to outside contamination and crushing strength stronger than other desiccants—that promote a longer life for products treated by the sieve. The most common use for the 4A molecular sieve is to remove water and moisture from materials that are in gas and liquid form.

Applications

• The drying of refrigerants and coolers.
• Removal of water and moisture from paint and polyurethane plastics.
• Drying of natural and cracked gas.
• Removal of moisture from insulating (both air and gas-filled) glass units.
• Dehydrating of ethanol, methanol, and other polar compounds.
• Moisture removal from propylene, ethylene, and other unsaturated hydrocarbons.

4A molecular sieve technical Index:

Function

1 Ion exchange performance-water softening function: Every oxygen atom in the framework of 4A molecular sieve is shared by two adjacent tetrahedrons. This structure forms a large crystal cavity that can be occupied by cations and water molecules. Moreover, these cations and water molecules have greater mobility and can undergo cation exchange and reversible dehydration. The ion exchange of 4A molecular sieve is carried out on the framework with aluminum ions. Each aluminum ion carries a negative charge, which can not only bind sodium ions, but also other cations. Calcium and magnesium ions can enter the large crystal cavities occupied by the original sodium ions, and the sodium ions in the 4A molecular sieve can be replaced-that is, the sodium ions in the 4A molecular sieve can be ion exchanged, and can be exchanged with Ca2+, Mg2+ ions in hard water Exchange, so as to achieve the purpose of softening water quality.

2 The binding speed of 4A molecular sieve to calcium and magnesium ions is slower than that of sodium tripolyphosphate, and its binding ability to magnesium ions is weaker. However, 4A molecular sieve can remove a small amount of harmful heavy metal ions (such as Pb2+, Cd2+, Hg2+) in the aqueous solution easily and quickly, which is of great significance for water purification.

3 Adsorption to surfactants-carrier liquid function: Due to the pore structure of the 4A molecular sieve crystals and the large specific surface area of the particles, the 4A molecular sieve has a strong adsorption performance.

4 Adsorption of non-ionic surfactants, 4A molecular sieve is 3 times that of NTA (nitrilotriacetate) and sodium carbonate, and 5 times that of sodium tripolyphosphate (STPP) and sodium sulfate. This property is useful for agglomeration It is of great significance to prepare products with good washing and flow properties by adding more surfactants in the production of highly concentrated washing powder. Through experiments, the liquid carrying capacity of 4A molecular sieve is ≥30%. Adding 4A molecular sieve in the washing powder production process can increase the fluidity of the material, adjust the viscosity, and obtain products with good appearance, fluidity and anti-caking ability.

5 Detergency: Through experiments on the same formula containing different additives, change the additives to compare their detergency, and found that 20% STPP, 20% molecular sieve, 4% polymer decontamination effect is equivalent to 40% STPP. Adding 10% sodium carbonate and 4.5% polymer to the 20% molecular sieve in the phosphorus-free formula can obtain a product with ideal detergency.

6 Anti-redeposition: 4A molecular sieve has good adhesion to oil stains. When zeolite is added to additives such as sodium carbonate, CMC, sodium silicate and sodium sulfate, it will significantly reduce the absorption of oil stains by nylon cloth. When the particle size of zeolite is 0.4-1.0μm, its dispersibility is better and it can prevent adhesion on the fabric. Although the dispersing ability of 4A molecular sieve is not as good as STPP, it can solve the problem of dirt dispersion by compounding with sodium polyacrylate.

7 Compatibility with other additives: 4A molecular sieve and other additives can complement each other's performance. 4A molecular sieve is not as good as STPP in terms of dirt dispersibility and hardness ion chelating ability, but 4A molecular sieve and STPP are mixed, detergency The effect of using STPP alone can be achieved. This is because STPP can quickly complex calcium and magnesium ions from the solid surface, and transfer to the 4A molecular sieve through the aqueous medium. The poor ability of 4A molecular sieve to bind magnesium ions can be compensated by compounding silicate and carbonate in molecular sieve.

8 PH buffering effect: 4A molecular sieve is alkaline, and the pH of 1% aqueous solution is 11.0, so it has a certain buffer alkalinity.

9 Safety: 4A molecular sieve is non-toxic and highly safe to the human body. No irritation to eyes and skin, no allergies, safe and reliable to use. After being washed, it is deposited in the soil, does not cause pollution, and can also improve the soil. 4A molecular sieve has no adverse effects on the ecology.

Storage

Room temperature, relative humidity not greater than 90% indoors: avoid water, acid, alkali, isolate air, and store in airtight.

Product Pictures

Regeneration

Removal of water: dry gas such as nitrogen, air, hydrogen, saturated hydrocarbon, etc. can be used to heat to 150-320℃ and pass into the molecular sieve bed under 0.3-0.5kg/m2 pressure for 3-4 hours, and then to the adsorber Pass in dry cold air for about 2-3 hours, isolate the air and cool to room temperature.

Removal of organic matter: the adsorbate can be replaced from the molecular sieve with water vapor, and then heated to (1). The regeneration can also be regenerated by superheated steam or inert gas at 200-350℃. Exposure to gases that produce explosive mixtures).

Removal of gaseous substances: It can be regenerated by decompression removal method.

Package

Packed in iron drums, (according to the product model) net weight 125kg, 135kg, 140kg, or according to user needs.

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.