High adsorption molecular sieve
Product Description
4A Molecular sieve
Brief introduction: Molecular sieve refers to a class of substances with uniform micropores and the pore size is equivalent to the general molecular size. Molecular sieves are widely used and can be used as high-efficiency desiccants, selective adsorbents, catalysts, ion exchangers, etc. However, the cost of using chemical raw materials to synthesize molecular sieves is very high. Commonly used molecular sieves are crystalline silicates or aluminosilicates, which are formed by silico-oxygen tetrahedrons or alumino-oxy tetrahedrons connected by oxygen bridges to form pores and cavities of molecular size (usually 0.3-2 nm) , It has the ability to screen fluid molecules of different sizes due to the different sizes and shapes of adsorbed molecules.
Chemical formula: Na2O·Al2O3·2SiO2·9/2H2O
Silicon to aluminum ratio: SiO2/Al2O3≈2
Effective pore size: about 4Å
| Property | Unit | Standard values | |
| Shape | Beads | ||
| Diameter | mm | 1.7-2.5 | 3.0-5.0 |
| Qualified size ratio | wt% | ≥98 | ≥98 |
| Bulk density | Kg/m³ | ≥680 | ≥660 |
| Abrasion | wt% | ≤0.2 | ≤0.2 |
| Crushing strength | N | ≥35 | ≥70 |
| Water adsorption capacity | wt% | ≥22 | ≥22 |
| Residual moisture | wt% | ≤1.5 | ≤1.5 |
| Shape | Cylindricals | ||
| Diameter | inch | 1/16 | 1/8 |
| Qualified size ratio | wt% | ≥98 | ≥98 |
| Bulk density | Kg/m³ | ≥660 | ≥640 |
| Abrasion | wt% | ≤0.25 | ≤0.25 |
| Crushing strength | N | ≥30 | ≥60 |
| Water adsorption capacity | wt% | ≥21.5 | ≥21.5 |
| Residual moisture | wt% | ≤1.5 | ≤1.5 |
| Test method | HG/T2690-2012 | ||
Molecular sieves contain metal ions with a lower electricity price and a larger ion radius and water in a combined state. The water molecules are continuously lost after heating, but the crystal skeleton structure remains unchanged, forming many cavities of the same size, and there are many cavities. Micropores with the same diameter are connected. These tiny pores have uniform diameters, which can adsorb molecules smaller than the pore diameter into the inside of the pores, while repelling molecules larger than the pores, so that molecules with different shapes and diameters can be excluded. , Molecules with different degrees of polarity, molecules with different boiling points, and molecules with different degrees of saturation are separated, that is, they have the function of "sieving" molecules, so they are called molecular sieves. Molecular sieves are widely used in metallurgy, chemical, electronics, petrochemical, natural gas and other industries.
Applicable occasions: Mainly used in the fields of automobiles, architectural glass, medicine, paint and coating, and packaging.
Other uses
(1) Water treatment-hard water softener, which can replace the sulfonated coal widely used in our country, thereby reducing costs;
(2) Metallurgical industry-separating agent, separating and extracting 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-silver zeolite antibacterial agent.
Package
Product Categories : Laboratory Chemicals