1m*3mm 4A分子筛色谱填充柱

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4A分子筛色谱填充柱
4A分子筛色谱填充柱 详细信息：

名称：填充柱
规格：1m*3mm
型号：4A

 4A分子筛的孔径是4A，主要用于吸附水，不吸附直径大于4A的任何分子，根据工业上的应用特点，我们生产的分子筛具有更快的吸附速度、更多的再生次数、更高的抗碎强度及抗污染能力，提高了分子筛的利用效率并延长了分子筛的使用寿命，是石油、化工行业中气液相深度干燥、精炼、聚合所必需的干燥剂。
化学式：
    化学式：Na2O·Al2O3·2SiO2·9/2H2O
    硅铝比：SiO2/ Al2O3≈2
    有效孔径：约4Å
性质功能：
    离子交换性能----软化水质功能： 4A分子筛骨架中的每一个氧原子都为相邻的两个四面体所共有，这种结构形成了可为阳离子和水分子占据的大晶穴，而且这些阳离子和水分子有较大的移动性，可进行阳离子交换和可逆脱水。4A分子筛的离子交换是在带有铝离子的骨架上进行的，每一个铝离子所带的一个负电荷，不仅可以结合钠离子，也可以结合其它阳离子。钙、镁离子可以进入原来钠离子占据的大晶穴，将4A分子筛中的钠离子替换下来----即4A分子筛中的钠离子可进行离子交换，可与硬水中的Ca2+、、Mg2+离子进行交换，从而达到软化水质的目的。
    4A分子筛结合钙镁离子的速度比三聚磷酸钠慢，且与镁离子的结合能力较弱。但4A分子筛可将水溶液中少量有害的重金属离子（如Pb2+、Cd2+、Hg2+）能很容易快速除去，对净化水质有着十分重要的意义。

4A分子筛色谱填充柱  图片：



4A molecular sieve chromatography packed column
4A molecular sieve chromatography packed column Details:

Name: Packed column
Specification: 1m*3mm
Model: 4A

 The 4A molecular sieve has a pore size of 4A, which is mainly used to adsorb water and does not adsorb any molecules with a diameter greater than 4A. According to the characteristics of industrial applications, the molecular sieve we produce has a faster adsorption speed, more regeneration times, and higher resistance. The crushing strength and anti-pollution ability improve the utilization efficiency of molecular sieve and prolong the service life of molecular sieve. It is the preferred desiccant necessary for gas-liquid phase deep drying, refining and polymerization in the petroleum and chemical industries.
Chemical formula:
    Chemical formula: Na2O·Al2O3·2SiO2·9/2H2O
    Silicon to aluminum ratio: SiO2/Al2O3≈2
    Effective pore size: about 4Å
Nature function:
    Ion exchange performance-water softening function: Each oxygen atom in the framework of 4A molecular sieve is shared by two adjacent tetrahedrons. This structure forms a large crystal cavity that can be occupied by cations and water molecules, and These cations and water molecules have greater mobility and can undergo cation exchange and reversible dehydration. The ion exchange of 4A molecular sieve is carried out on a framework with aluminum ions. Each aluminum ion has a negative charge that can not only bind sodium ions, but also other cations. Calcium and magnesium ions can enter the large crystal cavities occupied by the original sodium ions, and the sodium ions in the 4A molecular sieve can be replaced—that is, the sodium ions in the 4A molecular sieve can be ion exchanged and can be exchanged with Ca2+, and Mg2+ ions in hard water Exchange, so as to achieve the purpose of softening water quality.
    4A molecular sieve binds calcium and magnesium ions slower than sodium tripolyphosphate, and has a weaker binding capacity with magnesium ions. However, 4A molecular sieve can remove a small amount of harmful heavy metal ions (such as Pb2+, Cd2+, Hg2+) in the aqueous solution easily and quickly, which is of great significance for water purification.

4A molecular sieve chromatography packed column Picture: