A series of aluminasilicate Brnsted acid catalysts were synthesized with the "silica garden"method, and characterized with XRD, XPS and NH3 TPD technique. Acid center concentration was measured using ionic exchange method. Thecatalytic activities for cumene cracking of the silica garden Brnsted acid catalysts were observed and compared to that of zeolite HY and traditional acidicaluminasilicate catalysts. It was found that the 6 coordinate and 4 coordinate aluminum atoms were in silica garden Brnsted acid catalysts. There were two kinds of acid centers and a little of crystal in silica garden Brnsted acid catalysts. And it was also found that the crystal increased the acidities of the catalysts. The catalytic activity and strong acid center concentration of the silica garden Brnsted acid catalysts were between that of zeolite HY and traditional acidic aluminasilicate catalysts.
