Water Treatment 2.0mm 10*20 Mesh Molecular Sieve Type 4a

Water Treatment 2.0mm 10*20 Mesh Molecular Sieve Type 4a

Product description

4A molecular sieve has a pore size of 4A, which absorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene,

It does not adsorb any molecules (including propane) with a diameter greater than 4A, and the selective adsorption performance for water is higher than any other molecules. It is one of the most used molecular sieve varieties in industry.

Molecular formula: Na2O.Al2O3·2.0SiO2·4.5H2O

The pore size of 4A molecular sieve is 4A (1A=0.1 nanometers). 4A molecular sieve is an alkali metal aluminosilicate, which can adsorb water, NH3, H2S, sulfur dioxide, carbon dioxide, C2H5OH, C2H6, C2H4 and other molecules with critical diameters not greater than 4A. . It is widely used in the drying of gases and liquids, and can also be used in the refining and purification of certain gases or liquids, such as the production of argon.

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.

Application

It is one of the most reliable desiccants for a variety of applications 

• Refrigerant Drying
• Moisture removal in PU Plastic or Paint
• Natural Gas Drying
• Drying Cracked Gas
• Static drying of insulating glass units, whether air filled or gas-filled
• Dehydration of highly polar compounds, such as methanol and ethanol
• Dehydration of unsaturated hydrocarbons (e.g. ethylene, propylene, butadiene)

 Other uses

(1) Water treatment-hard water softener, which can replace the currently widely used sulfonated coal in our country, thereby reducing costs;

(2) Metallurgical industry-separation agent, separation and extraction of potassium, rubidium, cesium, etc. in brine. Used in industrial processes such as enrichment, separation and extraction of metals;

(3) Petrochemical industry-catalyst, desiccant, adsorbent;

(4) Agriculture-soil amendment;

(5) Medicine-antibacterial agent containing silver zeolite.

Technical Advantage

• Devoted to molecular sieves R&D and manufacture;

• Over 20 years of activated carbon industry expertise;

• ISO 9001:2008 certified;

• Owns proprietary intellectual property rights;

• Powerful R&D technical strength;

• Possessing sophisticated manufacturing equipment and inspection equipment;

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.