4A分子筛的孔径为4A，吸附水，甲醇、乙醇、硫化氢、二氧化硫、二氧化碳、乙烯、丙烯，不吸附直径大于4A的任何分子（包括丙烷），对水的选择吸附性能高于任何其他分子。是工业上用量*大的分子筛品种之一。

4A分子筛是一种碱金属硅铝酸盐，能吸附水、NH3、H2S、二氧化硫、二氧化碳、C2H5OH、C2H6、C2H4等临界直径不大于4A的分子。广泛应用于气体、液体的干燥，也可用于某些气体或液体的精制和提纯，如氩气的制取。

化学式：Na2O·Al2O3·2SiO2·9/2H2O
硅铝比：SiO2/ Al2O3≈2
有效孔径：约4Å
 

浩瀚色谱（山东）应用技术开发有限公司，研制的《4A分子筛微填色谱柱应用安捷伦7890》，安装在岛津，安捷伦，赛默飞，瓦里安，布鲁克，

PE等上，吸附二氧化碳，取得了不错的效果。

名称：4A分子筛微填充柱
规格：0.35m*1/16*0.75MM，100-120目
zui高使用温度：300°C

应用：干燥，脱水，吸附二氧化碳等

 
The pore size of 4A molecular sieve is 4A. It adsorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, and propylene, but does not adsorb any molecules with a diameter greater than 4A (including propane). Its selective adsorption performance for water is higher than any other molecule. It is one of the most widely used molecular sieve varieties in industry.
4A molecular sieve is an alkali metal aluminosilicate that can adsorb water NH3、H2S、 Molecules with critical diameters not exceeding 4A, such as sulfur dioxide, carbon dioxide, C2H5OH, C2H6, C2H4, etc. Widely used for drying gases and liquids, and can also be used for refining and purifying certain gases or liquids, such as the production of argon gas.
chemical formula: Na2O·Al2O3·2SiO2·9/2H2O
Silicon aluminum ratio: SiO2/ Al2O3≈2
Effective aperture: approximately 4 Å
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed the "Agilent 7890 4A Molecular Sieve Micro filled Chromatography Column Application", which has been installed in Shimadzu, Agilent, Thermo Fisher, Varian, and Bruker,
PE and other materials have achieved good results in adsorbing carbon dioxide.
Name: 4A Molecular Sieve Micro filled Column
Specification: 0.35m * 1/16 * 0.75MM, 100-120 mesh
Maximum operating temperature: 300 ° C
Application: Drying, dehydration, adsorption of carbon dioxide, etc