25N 2.5mm 3 Angstrom Zeolite Molecular Sieve

25N 2.5mm 3 Angstrom Zeolite Molecular Sieve

Product Description

Zeolite molecular sieve is the hydrate of crystalline aluminosilicate metal salt. After activation of zeolite molecular sieve, water molecules are removed and the remaining atoms form a cage structure. The aperture is 3~10Å. . There are many holes of a certain size in the molecular sieve crystal, and many of the holes are connected with the diameter of the hole (also known as "window "). Molecular sieve is named because it can adsorb molecules smaller than its pore diameter into the interior of the hole, while repels molecules larger than the pore diameter out of its hole, playing the role of screening molecules. Zeolite can exist in nature, artificial large number of synthesis from the 1970s began.

Its general chemical formula is: Mx/m[(AlO2)x·(SiO2)y]·zH2O. M represents a cation, m represents its valence number, z represents the hydration number, and x and y are integers.

Properties:

Molecular sieves are used as an adsorbent for gases and liquids. Molecules small enough to pass through the pores are adsorbed while larger molecules are not. It is different from a common filter in that it operates on a molecular level and traps the adsorbed substance. For instance, a water molecule may be small enough to pass through the pores while larger molecules are not, so water is forced into the pores which act as a trap for the penetrating water molecules, which are retained within the pores. Because of this, they often function as a desiccant. A molecular sieve can adsorb water up to 22% of its own weight.[7] The principle of adsorption to molecular sieve particles is somewhat similar to that of size exclusion chromatography, except that without a changing solution composition, the adsorbed product remains trapped because, in the absence of other molecules able to penetrate the pore and fill the space, a vacuum would be created by desorption.

3A molecular sieve technical Index:

Structure diagram

The adsorption of zeolite molecular sieve has two characteristics:

(1) The Lewis center on the surface is very polar;

(2) The size of the cage or channel in the zeolite is small, which makes the gravitational field strong. Therefore, its adsorption capacity for adsorbate molecules far exceeds other types of adsorbents. Even if the partial pressure (or concentration) of the adsorbate is very low, the adsorption capacity is still considerable. The adsorption and separation effect of zeolite molecular sieve is not only related to the size and shape of adsorbate molecules, but also related to its polarity. Therefore, zeolite molecular sieves can also be used for the separation of substances of similar size.

Application:

• Molecular sieves are often utilized in the petroleum industry, especially for the purification of gas streams and in the chemistry laboratory for separating compounds and drying reaction starting materials. For example, in the liquid natural gas (LNG) industry, the water content of the gas needs to be reduced to very low values (less than 1 ppmv) to prevent it from freezing (and causing blockages) in the cold section of LNG plants.

• They are also used in the filtration of air supplies for breathing apparatus, for example those used by scuba divers and fire fighters. In such applications, air is supplied by an air compressor and is passed through a cartridge filter which, dependent on the application, is filled with molecular sieve and/or activated carbon, finally being used to charge breathing air tanks. Such filtration can remove particulates and compressor exhaust products from the breathing air supply.

Storage

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

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).

The degassed substances can be regenerated by the decompression removal method.

Package

Can be packaged according to user needs.

Product Pictures

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.