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MOLECULAR SIEVES

Molecular Sieve
Molecular sieve is a synthetic hydrated alumina silicate (zeolite) or natural zeolite with the function of screening molecules and a very high surface area. The molecular sieve has high adsorption capacity, strong selectivity and high temperature resistance. It is mainly used in organic chemistry and petrochemical industry. It is also an excellent adsorbent for gas dehydration and purifies airborne pollutants.
These are the materials that can separate the molecules of this product according to their size. This capacity is based on the presence of small pores of equal and precise size with a diameter of between 3 and 10 Angstroms, depending on the material. Molecular sieves have a very large surface area within their pores, so while large molecules cannot enter the material through the pores, those with molecules small enough to penetrate do. Generally, polar molecules are absorbed and trapped by the inner surfaces of the pores, while non-polar molecules are not.
 
Usage areas :
Molecular sieves are used in a variety of industries and applications due to their ability to selectively adsorb gases and liquids based on their molecular size. Some of the common uses of molecular sieves are:
 
Gas purification: Molecular sieves are used to purify gases by removing impurities such as water vapor and hydrocarbons.
 
Liquid drying: Molecular sieves are used to dry liquids such as solvents and fuels by adsorbing water vapor and other impurities.
 
Separation of gases: Molecular sieves are used to separate gases according to their molecular size and allow separation of different gases in a mixture.
 
Oil refining: Molecular sieves are used in the petroleum industry to remove impurities from petroleum products and improve their quality.
 
Chemical production: Molecular sieves are used as a catalyst in the production of chemicals such as plastics and resins.
 
Food and beverage production: Molecular sieves are used to remove impurities and improve the quality of food and beverages.
 
Medical applications: Molecular sieves are used in the manufacture of medical products such as dialysis filters.
 
Types of Molecular Sieves
Types of molecular sieves that vary depending on the need and the size of the molecules to be separated:
 
3A (potassium type A)
4A (sodium type A)
5A (calcium type A)
13Z (sodium Z type)
It has 4 main types that determine the pore sizes.
 

3A (potassium type A):

 

3A molecular sieve mainly;

 

oil cracking gas

olefin

refinery gas

Besides oilfield gas

It is used to dry a desiccant in the chemical, pharmaceutical, insulating glass and other industries.

It is mainly used in gas drying, refrigerant drying, etc., where liquids (such as ethanol) are dried, insulating glass is air dried, mixed with nitrogen and hydrogen.

4A (sodium type A)

 

4A molecular sieves mainly;

 

Natural gas and various chemical gases and liquids

of refrigerants

of pharmaceuticals

Drying of electronic data and volatile substances

It is used for purification of argon and separation of methane, ethane and propane.

Mainly used for deep desiccant of gases and liquids, such as air, natural gas, hydrocarbons, refrigerants; preparation and purification of argon, static dryer of electronic components and perishable materials; dewatering agent in paints, polyesters, paints and coatings.

5A (calcium type A)

 

5A molecular sieve mainly;

 

natural gas drying

It is used for desulfurization and carbon dioxide removal.

Separation of nitrogen and oxygen to prepare oxygen, nitrogen and hydrogen; dewaxing of petroleum to separate normal hydrocarbons from branched hydrocarbons and cyclic hydrocarbons.

13Z (sodium Z type)


13x is mainly used in:


Gas purification in air separation unit to remove water and carbon dioxide.

Drying and sulphurisation of natural gas, liquefied petroleum gas and liquid hydrocarbons.

General gas deep drying.