壳层钛硅分子筛的制备与表征

采用两步水热晶化方法,以有机硅源和钛源制备了壳层钛硅分子筛RTS,利用多种分析表征和评价手段对RTS和常规钛硅分子筛TS-1的物化性质及催化氧化性能进行了分析表征和评价。结果表明:所制备的RTS物相为MFI结构,活性钛物种主要分布在颗粒的表层,为壳层钛硅分子筛;RTS在苯酚羟基化制备苯二酚的探针反应中表现出与TS-1相当的催化氧化活性和目的产物苯二酚的选择性,而且可重复使用,性能优于TS-1。

PREPARATION AND CHARACTERIZATION OF SHELL-TYPE TITANOSILICATE SIEVES

With organic silicon and titanium, a new shell-type titanosilicate sieve (RTS) was synthesized by two step hydrothermal crystallization method. The physical properties and catalytic oxidation performance of RTS was characterized by various analytic instruments and phenol hydroxylation reaction. The results show that RTS has MFI topological structure, and the Ti species in RTS are mainly on the shell part of particles. The catalytic performance results indicate that RTS gives the same catalytic oxidation activity and benzene diol selectivity as that of TS-1, and the reusable performance is better than that of TS - 1.