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在水溶液中锡盐与β分子筛金属化过程中很容易水解为氢氧化物,因此,制备高度分散的、以孤立形式存在的锡物种非常具有挑战性.我们先采用SnCl_2/氯化胆硷(ChCl)络合物将锡物种固定在高硅的商品化的β分子筛上,然后焙烧就可很方便地在水溶液条件下制得了高度分散于β分子筛上的锡物种.电镜照片、紫外-可见光光谱和X射线衍射结果证实了这一点.ChCl的存在促进了锡物种与分子筛的结合.担载(1-2)wt%Sn的β分子筛在葡萄糖-果糖异构化反应中表现出较高的催化活性和选择性.
Therefore, it is very challenging to prepare highly dispersed tin species in isolated form.We first use SnCl 2 / ChCl (ChCl) ) Complexes were immobilized on high silica commercial beta zeolites and then calcined to readily obtain tin species highly dispersed in beta molecular sieves under aqueous conditions.Electron microscopy, UV-Vis spectra and This is confirmed by the X-ray diffraction results. The presence of CHCl promoted the binding of tin species to the molecular sieve.The beta zeolites carrying (1-2) wt% Sn showed high catalytic activity in glucose-fructose isomerization And selective.