MFI分子筛前驱体对Y型沸石分子筛表面的修饰及其催化性质

Modification of Zeolite Y Impregnated by Preformed MFI Alumino- silicate Precursors and Catalytic Properties in Benzene Alkylation with Isopropanol

A novel method for increasing the conversion and optimizing the product distribution over the catalyst of zeolite Y modified by MFI aluminosilicate precursors in the reaction of benzene alkylation with isopropanol is reported. The catalyst(PASP MFI/Y) is prepared from the impregnation of zeolite Y with preformed MFI aluminosilicate nanoclusters. The characterization of temperature-programmed desorption of ammonia shows that the PASP MFI/Y exhibits a stronger acidity than Y zeolite does. The catalytic results show that the PASP MFI/Y exhibits a more excellent activity(conversion for isopropanol and toluene) and shape selectivity(p- and m-cymene) in the reaction than zeolite Y.