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目前应用的分子篩是一种均匀微孔型的泡沸石,其結构是由SiO_4与Alo_4四面体组成的多面体系,这些多面体系以不同方式堆积而形成了泡沸石,一般化学通式为Me_(x/n)[(AlO_2)_x(SiO_2)_y]·mH_2O (Me为金属,n为阳离子价数,m为水分子数)。不論天然或合成的泡沸石经加热脱水后对某些物质具有强烈的吸附性,因吸附貭分子的形状、大小以及亲和力的不同,以致吸附速度有所差別,基于这种特性,已被广泛地应用于許多物质的分离与純化,更感兴趣的是目前已将分子篩应用于催化反应,具有独特的高度选择性和经久
The molecular sieve currently used is a homogeneous microporous zeolite whose structure is a polyhedral system composed of SiO 4 and Alo 4 tetrahedra. These polyhedral systems accumulate in different ways to form zeolites. The general chemical formula is Me_ (x / n) [(AlO_2) _x (SiO_2) _y] · mH_2O (Me is a metal, n is the cation valence, and m is the number of water molecules). Regardless of natural or synthetic zeolite zeolite after heating dehydration of certain substances have a strong adsorption, adsorption molecules due to the shape, size and affinity of the different, resulting in different adsorption speed, based on this feature, has been widely Applied to the separation and purification of many substances, more interested in the molecular sieve has been used in catalytic reactions, has a unique highly selective and durable