硼-硅Pentasil型沸石的晶化相区与导向剂

新型沸石分子筛的开发是国际上分子筛化学界关注的问题之一。我们为了开拓含杂原子骨架结构的沸石分子筛的合成工作,系统地进行了硼硅Pentasil型沸石的研究。

THE CRYSTALLIZATION FIELD AND DIRECTING AGENT OF BORON-SILICON PENTASIL TYPE ZEOLITE

Isothermal phase transformation diagram was developed for TPA2O-B2O3 -SiO2-H2O system at 160#. B-Si pentasil type zeolite was obtained as a pure phase from the reaction mixture with the mole ratio SiO2/B2O3 being 55-80, and we have for the first time prepared the directing agent of this kind of zeolite. It was proved by electron diffraction technique that the colloidal particles of directing agent with the structure of corresponding zeolite framework, which acts as nuclei, dispersed highly and exhibit directing effect powerfully for the crystallization of B-Si pentasi type zeolite. Also some properties of B-Si pentasil type zeolite such as structure of framework, stability to heat and acid, selective absorption to the infrared and adsorption properties have been studied, May be it provides the evidence for opening up the application of this zeolite.