Composition of HZSM-5 Zeolites and Its Effect on the Selectivity of Toluene Ethylation

Abstract

Abstract: The shape selectivity for the alkylation of toluene with ethanol by varying Si/Al ratios of HZSM-5 and DAI HZSM-5 zeolites was studied. The results show that p-ethyltoluene selectivity increases with the zeolite Si/Al ratio increase. By treating HZSM-5 zeolite with SiCl₄ vapor, the aluminium atoms were removed, indicating that the surface is deficient in aluminium obviously. At a high temperature and within short time, especially, HZSM-5 zeolites treated by SiCl₄ showed obviously a higher p-selectivity, but the activity had no clear change.

Key words: ZSM-5 zeolite. Shape selectivity, Dealumination, Alkylation

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Liu Shangyuan, Liu Shuangxi, Sun Mingyong . Composition of HZSM-5 Zeolites and Its Effect on the Selectivity of Toluene Ethylation[J]. Chem. J. Chinese Universities, 1989, 10(6): 661.

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Composition of HZSM-5 Zeolites and Its Effect on the Selectivity of Toluene Ethylation

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