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Home » Products » Molecular Sieve
  • 3A Molecular SieveThe 3A molecular sieve is a kind of alkali metal alumino-silicate. Sometimes, it is also called 3A zeolite molecular sieve ...
  • 4A Molecular SieveThe 4A molecular sieve, also called actived alumina zeolite 4A, is a kind of alkali metal aluminosilicate.
    The 4A molecular sieve...
  • 5A Molecular SieveThe 5A molecular sieve, sometimes also called calcium molecular sieve or 5A zeolite, is often utilized in the petroleum industry...
  • 13X Molecular SieveThe 13X molecular sieve, also known as zeolite 13X desiccant, is often utilized in drying water, carbon dioxide and hydrogen sulfide ...

Molecular Sieve

Description:
The natural molecular sieve, also called purification zeolite, is a kind of crystallized aluminosilicate. Its pore size can be 3A, 3A, 4A, 5A, and 13X.
The molecular sieve contains tiny pores of a precise and uniform size, and it is mainly used as an adsorbent for gases and liquids.

This kind of sieve operates on molecular level and traps absorbed substances. It can adsorb water as much as 22% of its own weight. Its adsorption principle is quite similar to that of size exclusion chromatography, except that without a changing solution composition.

Generally speaking, the molecular sieve consists of aluminosilicate minerals, clays, porous glasses, microporous charcoals, zeolites, active carbons, or synthetic compounds that have open structures through which small molecules, such as nitrogen and water can diffuse.

The purification zeolite or molecular sieve is 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 LNG industry, the water content of the gas needs to be reduced to very low values (less than 1ppmv)to prevent it from freezing (and causing blockages) in the cold section of LNG plants.

Methods of molecular sieve regeneration include pressure change (as in oxygen concentrators), heating and purging with a carrier gas (as when used in ethanol dehydration), or heating under high vacuum. Temperatures typically used to regenerate water-adsorbed molecular sieves variety from 130 °C to 250 °C.

Storage:
1.The molecular sieve should be covered.
2.The aluminosilicate molecular sieve should be regenerated before using it: a. the purification zeolite has been kept for a long time; b. the natural molecular sieve has been moisture absorption.

Features of Purification Zeolite:
1. The molecular sieve in different sizes and shapes has different absorption functions.
2. The molecular sieve has selective adsorption towards small polar molecules and unsaturated molecules. The selective adsorption is determined by the polarity degree and the saturation degree.
3. Purification zeolite has strong water absorption. Under high temperature, fast airspeed or low moisture content, it still has quite high water absorption capacity.

Specification and Function:

Model Bulk Density (g/ml) Static Water Absorbing Capability (%) Attrition Abrasion W (%)
3A 0.60~0.68 19~20 0.3~0.6
Be used in desiccation of petroleum cracking gas and alkenes
4A 0.60~0.65 20~21 0.3~0.6
Be used in separation of natural gas and alkenes
5A 0.60~0.65 20~21 0.3~0.5
Be used in desiccation and purification of air; dehydration and desulphurization of natural gas; desulphurization of petroleum gas; oxygen and hydrogen production by pressure swing absorption process
5A-DW 0.45~0.50 21~22 0.3~0.6
Be used in degreasing and pour point depression of aviation kerosene and diesel, and alkenes separation
10X 0.50~0.60 23~24 0.3~0.6
High-efficient sorption, be used in desiccation, decarburization, desulphurization of gas and liquids and separation of aromatic hydrocarbon.
13X 0.55~0.65 23~24 0.3~0.5
Be used in desiccation, desulphurization and purification of petroleum gas and natural gas.
13X-AS 0.55~0.65 23~24 0.3~0.5
Be used in decarburization and desiccation in air separation industry
Cu-13X 0.50~0.60 23~24 0.3~0.5
Be used in sweetening of aviation and corresponding liquid hydrocarbons

TallKee import/export is a professional manufacturer of molecular sieve in China. Our company is located in Pingxiang, ceramic hometown of China. Besides, our company is quite near to Shenzhen and Shanghai ports, two largest ports in China, which makes both the shipping and air transportation quite convenient. Regarding the delivery period of molecular sieve, 12days/20gp is for those to be exported abroad, and 7days/20gp is for the ones to be sold at home. Featuring good wear, corrosion, high-temperature resistance, high strength and hardness, unique design and competitive prices, our molecular sieve has been well received by customers from Southeast Asia, Middle East, Russia, United States, Canada, South America, Japan, Korea, Singapore, Thailand, Vietnam, Myanmar and so on. If you're interested in our molecular sieve, please feel free to contact us.