Molecular sieves

Molecular Sieves 3A

3A molecular sieve refers to the type A sialic acid potassium salt. 3A molecular sieve can adsorb molecular whose critical diameter is no more than 3A.
Molecular Sieves 3A Properties
What is Molecular Sieves 3A ?

3A molecular sieve is a synthetic crystalline material with a structure similar to natural zeolite. Its basic structural unit is a tetrahedron composed of silicates and aluminates, which form a three-dimensional pore structure by sharing oxygen atoms. 3A molecular sieve has an angstrom diameter of around 3 angstroms (i.e., 3×10^-10 m), called 3A molecular sieve. This molecular sieve has a high degree of order and regularity and can adsorb and catalyze molecules of specific size. 3A molecular sieve has many unique properties. First, it is characterized by high thermal stability and can be used in high temperatures. Secondly, it has excellent adsorption and desorption properties and can adsorb and separate molecules of specific sizes. In addition, it also has good hydrothermal stability and anti-toxicity and can maintain stable performance in the presence of certain impurities.

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Technical Parameter of Molecular Sieves 3A:
Item Type Unit Spherical Bar Note
Diameter mm 1.6-2.5 3-5 1/16’’ 1/8’’ -
Static H₂O Adsorption %wt ≥21.5 ≥21.5 ≥21.5 ≥21.5 RH75%, 25℃
%wt ≥21 ≥21 ≥21 ≥21 RH75%, 35℃
Bulk Density g/ml ≥0.75 ≥0.75 ≥0.70 ≥0.70 Tapped
Crush Strength N ≥35 ≥100 ≥40 ≥90 Average 25 beads
Loss on Attrition %wt ≤0.1 ≤0.1 ≤0.2 ≤0.2 -
RSD of Crush Strength - ≤0.3 ≤0.3 ≤0.3 ≤0.3 -
Particle Ratio % ≥98 ≥98 ≥98 ≥98 -
Package Moisture %wt ≤1.5 ≤1.5 ≤1.5 ≤1.5 575℃, 1hr
Static Ethylene Adsorption mg/g ≤3.0 ≤3.0 ≤3.0 ≤3.0 0℃, 760mmHg

Applications of Molecular Sieves 3A:

Industrial catalysis
As the main carrier material of catalyst, 3A molecular sieve is widely used in industrial catalysis. It can support a variety of metal ions, such as copper, zinc, manganese, etc., to form a catalyst with specific catalytic properties. 3A molecular sieve catalyst has excellent catalytic performance in many organic reactions, such as alkylation reactions, isomerization reactions, disproportionation reactions, etc. In addition, a 3A molecular sieve may be utilized as an addition to the catalyst to increase the efficiency and effectiveness of the catalyst.
Gas separation and adsorption
Molecular sieves 3A have regular pore structures and highly dispersed active sites, which can adsorb and separate molecules of specific sizes. A 3A molecular sieve can separate and purify nitrogen, oxygen, hydrogen, and other gases in gas separation. In addition, it can also be used to remove impurities in gaseous and liquid media, such as water, carbon dioxide, and hydrogen sulfide. In adsorption, a 3A molecular sieve can be used to remove harmful substances in the air, such as organic volatile substances such as formaldehyde and benzene, as well as harmful gases such as ammonia and hydrogen sulfide.
Environmental protection
3A molecular sieve is also widely used in the field of environmental protection. It can be used for waste gas treatment and desulfurization and denitrification processes to remove harmful substances in the air, such as sulfur dioxide and nitrogen oxides. In addition, 3A molecular sieves can be used in water treatment to remove harmful substances, such as heavy metal ions and organic pollutants.
Petrochemical industry
3A molecular sieve is also widely used in the field of petrochemical industry. It can be used as a carrier material for catalysts to improve the efficiency and yield of petrochemical processes. In addition, 3A molecular sieves can also be used for the adsorption separation and purification of petroleum products, such as gasoline,  lubricating oil, etc. It can adsorb and separate harmful substances and improve the quality and stability of petroleum products.
Oxygen and hydrogen production
3A molecular sieve also has application value in the oxygen and hydrogen production field. In oxygen production, a 3A molecular sieve can be used as an adsorbent to adsorb and separate oxygen from the air. In hydrogen production, a 3A molecular sieve can adsorb and separate hydrogen to improve the purity and yield of hydrogen. In addition, 3A molecular sieve can also be used as a catalyst carrier material for ammonia synthesis and other fields.

Productions Method of Molecular Sieves 3A:

Raw material preparation

The production of a 3A molecular sieve requires the preparation of silicate, aluminate, hydroxide, and water. Among them, silicate and aluminate are the basic components of molecular sieves; hydroxide is used as a templating agent, and water is used as a solvent and reaction medium. In the preparation process, it is necessary to pay attention to the quality and purity of the raw materials to ensure that the produced molecular sieve has high quality and performance.

Synthesis procedure

The synthetic steps to produce a 3A molecular sieve include:

  • Dissolving silicate and aluminate in a solvent.
  • Adding a certain amount of organic template agent and other additives to adjust the chemical composition and properties of the solution.
  • Stirring and crystallizing the solution to form a precursor solution.
  • Filtering.
  • Washing and drying the precursor solution to obtain 3A molecular sieve crystals.

In the synthesis process, it is necessary to control certain synthesis conditions, such as reaction temperature, reaction pressure, solution pH value, and stirring speed. These conditions will affect the crystallization and structure of the molecular sieve and thus affect its performance.

Catalyst carrier selection

Selecting the appropriate carrier material is necessary if a 3A molecular sieve is used as a catalyst carrier. Commonly used carrier materials include alumina, calcium silicate, molecular sieve, etc. It is necessary to consider the chemical stability, mechanical strength, thermal stability, and other factors when selecting the support material to ensure the overall performance of the catalyst.

Catalyst preparation

The composite of 3A molecular sieve and carrier material prepared the catalyst. In the preparation process, the active components must be impregnated, dried, and calcined to make the active components evenly distributed on the 3A molecular sieve catalyst. At the same time, the particle size and morphology of the catalyst should be controlled during the preparation process to ensure the activity and stability of the catalyst.

Quality detection and characterization

The produced 3A molecular sieves must be quality tested and characterized to determine their chemical composition, crystal structure, active component content, specific surface area, pore structure, and other key parameters. These parameters will directly affect the performance and application range of the catalyst.

Quality detection and characterization mainly include chemical analysis, X-ray diffraction, infrared spectroscopy, N2 adsorption-desorption, and other methods and means. Through these methods, key parameters such as composition, crystal structure, and pore characteristics of 3A molecular sieve can be determined to evaluate whether its quality and performance meet the requirements.


Storage and transportation processes need to pay attention to the following points:

  1. To avoid 3A molecular sieve by moisture or moisture damage so as not to affect its quality and performance.
  2. It is necessary to avoid mechanical or physical damage to the 3A molecular sieve so as not to affect its integrity and use effect.
  3. 3A molecular sieves should be avoided by chemical substances to not affect their composition and structure.


Packing & Shipping of Molecular Sieves 3A:

25kg/carton lined with PE bag;

55 gallon / sealed steel drum;

TRUNNANO can customize different packaging according to customer requirements.


Molecular Sieves 3A supplier

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.

If you are looking for high-quality Molecular Sieves 3A, please feel free to contact us and send an inquiry. ([email protected])


Molecular Sieves 3A Properties

Other Names N/A
Compound Formula N/A
Molecular Weight N/A
Appearance NA
Melting Point N/A
Boiling Point N/A
Density N/A
Solubility in H2O N/A
Exact Mass N/A

Molecular Sieves 3A Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
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