Synthesis of Heteroatom-Containing Zeolites ZSM-5,ZSM-11 and ZSM-48

Abstract

Abstract: By means of pretreatment-grinding gel, Ti-ZSM-48 zeolite was synthesized in the presence of HMDAtemplate under dynamic and static conditions.Several zeolites having ZSM-5 structure and containing the fourth periodic transition metals were synthesized by us ing a mixture of 85% HMDAand 15% TPABr as the template for the first time under static conditions with previous aging at low temperature.Acompared investigation of the above synthesis and those of M-ZSM-5 and M-ZSM-11 with HMDAand TPABr as the template re spectively were carried out. XRDanalysis at the growing stages of crystals showed that the synthesis methods, pHvalues and content of sodium ions had great effects on crystallization dynamics, and the optimal synthesis conditions were found.Characterization of the prepared samples indicated that the heteroatoms were located in the zeolite frameworks.

Key words: Heteroatom zeolite, Gel pretreatment, Template, Crystallization dynamics, Dy namic method

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ZHANG Chun-Lei, WU Zhi-Yun, KAN Qiu-Bin, ZHANG Fu-Shun, ZHAO Zhong-Qing. Synthesis of Heteroatom-Containing Zeolites ZSM-5,ZSM-11 and ZSM-48[J]. Chem. J. Chinese Universities, 1994, 15(10): 1433.

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Synthesis of Heteroatom-Containing Zeolites ZSM-5,ZSM-11 and ZSM-48

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