以天然膨润土为原料,采用高温碱熔水热法合成4A分子筛. 活化温度、SiO_2/Al_2O_3、Na_2O/SiO_2、H_2O/Na_2O等工艺条件对4A分子筛结构与性能的影响. 结果表明,*佳的活化温度为600 ℃;物料经此温度活化后,调节组成为SiO_2/Al_2O_3=1.5、Na_2O/SiO_2=3与H_2O/Na_2O=50,于90 ℃反应6 h可以得到质量较好的4A分子筛,其产品的晶形规整,晶粒均小于2 μm,钙离子交换容量可达到314 mg CaCO3/g.
 
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。其是工业上用量*大的分子筛品种之一。

名称：填充柱
规格：1m*3mm
型号：4A Natural bentonite is used as raw material to synthesize 4A molecular sieve by high temperature alkaline fusion hydrothermal method. The influence of activation temperature, SiO_2/Al_2O_3, Na_2O/SiO_2, H_2O/Na_2O and other process conditions on the structure and performance of 4A molecular sieve. The results show that the best activation The temperature is 600 ℃; after the material is activated at this temperature, the composition is adjusted to SiO_2/Al_2O_3=1.5, Na_2O/SiO_2=3 and H_2O/Na_2O=50, reacting at 90 ℃ for 6 hours can get a good quality 4A molecular sieve, its product The crystal shape is regular, the crystal grains are all less than 2 μm, and the calcium ion exchange capacity can reach 314 mg CaCO3/g.
To
The 4A molecular sieve has a pore size of 4A, which absorbs water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, and propylene. It does not adsorb any molecules (including propane) with a diameter greater than 4A. The selective adsorption performance of water is higher than any other molecules. It is one of the most widely used molecular sieves in the industry.

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