High-silica Y molecular sieve

Y-type molecular sieve is a microporous crystal material with a skeleton structure, consisting of silicon oxygen and aluminum oxygen tetrahedra as the basic structural units. These tetrahedra form secondary structural units such as quaternary, quaternary, and quaternary rings through Si-O or Al-O bonds. Then, these secondary structural units are assembled together to form a beta cage. Eight beta cages are arranged according to the diamond crystal pattern, with each carbon atom in the diamond structure replaced by a beta cage. Adjacent beta cages are connected by a hexagonal ring with Si-O-Si (Al) to form an octahedral zeolite cage. The octahedral zeolite cages are interconnected along three crystal axis directions by a twelve membered ring, forming a unit cell. The twelve membered ring is the main window of octahedral zeolite, with a pore size of approximately 0.74nm.

Composition of Y molecular sieve:

Y molecular sieves include NaY molecular sieves and related modified products of NaY, such as ammonium Y (NH4Y), hydrogen Y (HY), ultra stable Y (USY), rare earth Y (RY), etc.

The relationship between NaY and its modified products:

1.NaY is synthesized from aluminum source, silicon source, and directing agent under certain process conditions;

2.Ammonium Y is obtained by exchanging NaY with ammonium chloride;

3.Hydrogen Y is obtained by high-temperature calcination of ammonium Y;

4.Hydrogen Y undergoes high-temperature hydrothermal treatment to obtain ultra stable Y;

5.Hydrogen Y is exchanged with rare earth elements to obtain rare earth Y.

Application of Y molecular sieve:

1.Widely used in the production of catalytic cracking catalyst FCC

2.Used for making catalytic cracking catalysts

3.Used for making hydrocracking catalysts

4.Used for producing efficient adsorption separation purification agents and desiccants

Product nature:

High silica Y-type molecular sieve is a microporous crystal material with a skeleton structure, consisting of silicon oxygen and aluminum oxygen tetrahedra as the basic structural units. It has strong adsorption capacity, wide adsorption range, high temperature stability, and strong hydrophobicity.

Product performance characteristics and application scenarios:

Performance characteristics:

Strong adsorption selectivity, capable of selective adsorption based on the size and polarity of molecules; Strong adsorption capacity, even if the gas composition concentration is very low, it still has a large adsorption capacity; It is less affected by temperature and still has a large adsorption capacity at higher temperatures; High temperature regeneration, high regeneration efficiency, and high safety.

Application scenarios:

Widely used in adsorption, separation, catalysis, and environmental fields, it is suitable for the treatment of organic waste gases with high air volume and low concentration. Applied in industrial gas manufacturing, petrochemicals, food and pharmaceutical production, refrigeration equipment, automotive brake systems, and other fields.