High-strength molecular sieve adsorbent, mineral adsorbent

Molecular sieve concept:

In 1932, McBain introduced the concept of "molecular sieve".Molecular sieve它指的是一种具有均匀分布的微孔的物质，这些微孔的大小与普通分子相当。分子筛被广泛用作高效的干燥剂、选择性吸附剂、催化剂、离子交换剂等。然而，使用化学原料合成分子筛的成本相当高。常用的分子筛是结晶硅酸盐或铝硅酸盐，它们由四面体结构的硅氧或铝氧单元构成。connected by oxygen bridges, creating pore systems and cavities of molecular size (usually 0.3~2 nm). These sieves have the ability to filter fluids of different sizes and shapes, depending on the size and shape of the adsorbed molecules.

由于存在电荷较低且离子半径较大的金属离子，以及水的结合状态，水分子在加热时会不断失去水分。然而，晶格结构保持不变。这导致形成了许多大小相同的空腔。这些空腔通过许多直径相同的微孔相互连接。这些微小的孔隙具有均匀的直径，能够吸附比孔隙直径小的分子进入空腔中。Repelling molecules larger than the pore diameter. Thus, they can separate molecules with different shapes, diameters, polarities, boiling points, and degrees of saturation. In other words, they function as a "sieve" for molecules. Molecular sieves are widely used in industries such as metallurgy, chemical engineering, electronics, petrochemicals, and natural gas.

Molecular sieves, also known as synthetic zeolites, are a type of aluminosilicate microporous crystals. They consist of a basic framework structure made up of silicon oxygen and aluminum oxygen tetrahedra. Within the crystal lattice, metal cations such as Na+, K+, Ca2+, Li+ etc. are present to balance the excess negative charges in the crystal. Molecular sieves are mainly classified into different types based on their crystal structure: type A, type X, type Y, etc.

Adsorption Principle:

The adsorption of substances by molecular sieves is due to physical adsorption (van der Waals forces). The internal cavities of the crystals have strong polarity and Coulomb fields, which exhibit strong adsorption capabilities for polar molecules (such as water) and unsaturated molecules.
Sieve function: The pore size distribution of molecular sieves is very uniform. Only substances with a molecular diameter smaller than the diameter of the pores can enter the cavities of the molecular sieve.
<<? By distinguishing different substances based on the order of adsorption and size, it is vividly referred to as a "molecular sieve".

Purpose:

1. Deep drying of gases and liquids such as air, natural gas, alkanes, refrigerants, etc.

2. Production and purification of argon gas

3. Static drying of electronic components and materials susceptible to moisture-induced deterioration

4. Dehydrating agents in paints, polyester products, dyes, and coatings

Technical Standards: