Vapor-Phase Alkylation of Toluene with Isopropanol over Mg/Al, Ni/Al and Cu/Al Hydrotalcites (Layered Double Hydroxide).
In: Catalysis Letters, Jg. 81 (2002-07-01), Heft 1/2, S. 119-124
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Zugriff:
Vapor-phase isopropylation of toluene has been carried out over Mg/Al, Ni/Al and Cu/Al calcined hydrotalcites (CHTs). Reaction conditions were optimized for alkylation by varying temperature, weight hourly space velocity and reactant mole ratio. Side-chain alkylation is found to be more predominant than ring alkylation over Mg/Al CHT, while Ni/Al and Cu/Al CHTs favored ring alkylation. The main products were isobutylbenzene and cymene. The combined participation of acidic and basic sites of the materials is found to be crucial for both side-chain and ring alkylation of toluene with isopropanol. An X-ray diffraction pattern of the resulting oxide indicates a diffuse MgO structure. The incorporation of small amounts of Al 3+ to MgO generates new surface Lewis acid--base pair sites. [ABSTRACT FROM AUTHOR]
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Titel: |
Vapor-Phase Alkylation of Toluene with Isopropanol over Mg/Al, Ni/Al and Cu/Al Hydrotalcites (Layered Double Hydroxide).
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Autor/in / Beteiligte Person: | Manivannan, R. ; Pandurangan, A. |
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Zeitschrift: | Catalysis Letters, Jg. 81 (2002-07-01), Heft 1/2, S. 119-124 |
Veröffentlichung: | 2002 |
Medientyp: | academicJournal |
ISSN: | 1011-372X (print) |
DOI: | 10.1023/A:1016084710619 |
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