Synthesis and Catalytic Performances of Mesoporous Aluminosilicates of Cubic and Hexagonal Structure with Stronger Acid Sites

Abstract

Abstract: 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, N₂ physical adsorption and desorption, ²⁷Al MAS NMRand NH₃ TPDtechniques. 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 (SiO₂) 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.

Key words: Mesoporous materials, Cubic and hexagonal structure, Acidity, Alkylation

CLC Number:

O643.3

TrendMD:

LI Gong, KAN Qiu-Bin, WU Tong-Hao, HOU Chang-Min, HUANG Jia-Hui, WU Shu-Jie, LI Can . Synthesis and Catalytic Performances of Mesoporous Aluminosilicates of Cubic and Hexagonal Structure with Stronger Acid Sites[J]. Chem. J. Chinese Universities, 2002, 23(6): 1171.

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Synthesis and Catalytic Performances of Mesoporous Aluminosilicates of Cubic and Hexagonal Structure with Stronger Acid Sites

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