中文摘要：

以发烟硅胶为硅源,以钛酸正丁酯为钛源,以四丙基氢氧化铵(tetrapropylammonium hydroxide,TPAOH)为模板剂,采用干胶转化法,在添加晶种的条件下,合成了一系列TS-1(titanosilicalite-1)分子筛。通过X射线粉末衍射及扫描电镜表征材料的性能。结果表明:晶种的添加及晶种的选择对TS-1分子筛的结晶度、晶粒尺寸和催化性能产生明显的影响。当摩尔比n(TPA+)/n(Si)=0.05时,不加任何晶种,正己烯的转化率只有11.9%;当加入活性晶种后,正己烯的转化率为23.6%,提高了约12%。对于焙烧晶种合成的样品,活性也有很大提高,烘干晶种与活性晶种合成的产品性能相当。活性晶种的引入,可以在保持TS-1催化性能基本不变的条件下明显减少模板剂用量,较大幅度地降低TS-1分子筛的合成成本。

英文摘要：

Titanosilicalite-1(TS-1) has been synthesized successfully by a low cost dry-gel conversion method from fumed silica sources,with tetrabutylorthotitanate(TBOT) as titanium source and tetrapropylammonium hydroxide(TPAOH) as the template with the cooperative effects of active seeds.The influence of the crystal seeds on the formation of TS-1 was thoroughly investi-gated.Some physical and chemical properties and the structure of the product were characterized by the X-ray diffraction and scanning electron micro...