中文摘要：

以介孔分子筛MCM-41为硅源,采用水热晶化法合成了微孔β沸石. 按照这种方法得到的β沸石除了具备微孔沸石的全部特点外,孔结构也继承了其前体的一些介孔特性,与传统方法合成得到的β沸石相比,其孔径高出30%以上,孔容更高出60%以上,而且晶粒小, B酸酸度高,从而改善了其在大分子反应过程中的扩散和反应性能. 因此,当以这种方法合成的β沸石作为加氢裂化催化剂裂解组分用于处理重质烃物料时,催化剂的活性和中油选择性同时得到了明显改善,与采用传统方法得到的β沸石相比,动力学活性提高近60%,特别是中油选择性显著提高了2.5%.

英文摘要：

MCM-41, a typical mesoporous molecular sieve, was used as silicon source to synthesize β zeolite in hydrothermal process. The β zeolite not only has all characteristics of a microporous zeolite but also inherits some properties of a mesoporous molecular sieve. Its pore diameter and pore volume are 30 % and 60 %, respectively, higher than that of the β zeolite prepared by the traditional method. Moreover it has smaller crystal grains and much more B acidity. Therefore, when being used as the cracking component in a hydrocracking catalyst, it shows improved catalytic performance. The dynamic activity is promoted by 60 % and the middle distillate selectivity is significantly increased by 2.5 % compared with the typical commercial hydrocracking catalyst.