Mesoporous aluminosilicates with cubic and hexagonal structure have been synthesized by structure units of β zeolite in a two step crystallization process and characterized by XRD, IR, N 2 physical adsorption and des...Mesoporous aluminosilicates with cubic and hexagonal structure have been synthesized by structure units of β zeolite in a two step crystallization process and characterized by XRD, IR, N 2 physical adsorption and desorption, 27 Al MAS NMR and NH 3 TPD techniques. The results show that MB48(25) and MB41(25) were similar to MCM 48 and MCM 41 on the long range structure respectively and MB48 with a cubic structure can be synthesized under the condition of a lower n (CTMAB)/ n (SiO 2) ratio. HMB48(25) and HMB41(25) exhibit a stronger acidic strength than conventional HMCM 41. The catalytic activity of HMB48(25) was the highest for cumene cracking and alkylation of 2,4 tert butylphenol with tert butylalcohol.展开更多
文摘Mesoporous aluminosilicates with cubic and hexagonal structure have been synthesized by structure units of β zeolite in a two step crystallization process and characterized by XRD, IR, N 2 physical adsorption and desorption, 27 Al MAS NMR and NH 3 TPD techniques. The results show that MB48(25) and MB41(25) were similar to MCM 48 and MCM 41 on the long range structure respectively and MB48 with a cubic structure can be synthesized under the condition of a lower n (CTMAB)/ n (SiO 2) ratio. HMB48(25) and HMB41(25) exhibit a stronger acidic strength than conventional HMCM 41. The catalytic activity of HMB48(25) was the highest for cumene cracking and alkylation of 2,4 tert butylphenol with tert butylalcohol.
