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沸石是一种排列规整的结晶状硅铝酸盐。五十年代初,在美国合成沸石以分子筛的名称出售,因其内孔尺寸与分子大小相近,一些小分子可被吸附,大的分子则被排斥在外,形同“筛子”,起分离作用。它主要用于流体净化,如干燥、脱硫化氢和低分子量硫醇等,其性能比常用的吸附剂优越。一些公司利用沸石的筛分原理,创立了新的混合物分离方法。美国环球油品公司利用沸石模拟移动床,已开发成功8种分离
Zeolite is a well-ordered crystalline aluminosilicate. In the early 1950s, synthetic zeolites were sold under the molecular sieve name in the United States. Because of their similar pore size and molecular size, some small molecules can be adsorbed and large molecules can be excluded. It is mainly used for fluid purification, such as drying, hydrogen sulfide and low molecular weight mercaptan, its performance is superior to the commonly used adsorbents. Some companies use the sieving principle of zeolites to create a new mixture separation method. US Global Oil Company uses zeolite to simulate moving beds and has successfully developed eight separations