NaY 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 Si-O-Si (Al) through a hexagonal ring, forming an octahedral zeolite cage. The octahedral zeolite cages are interconnected along three crystal axis directions through 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.

Y molecular sieves can be divided into NaY molecular sieves and related modified products of NaY: ammonium Y (NH4Y), hydrogen Y (HY), ultra stable Y (USY), rare earth Y (RY), etc.

NaY molecular sieve refers to the sodium type of Y-shaped crystal structure molecular sieve, which is an alkali metal silicate aluminum salt. Due to its unique three-dimensional pore structure, it has a wide range of applications in adsorption separation, catalysis, and ion exchange.

The relationship between NaY molecular sieve and related 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.

The use of Y-type molecular sieve: widely used in the production of catalytic cracking catalyst FCC; Used for making catalytic cracking catalysts; Used for making hydrocracking catalysts; Used for producing efficient adsorption separation and purification agents and desiccants.