Fe-Modified Zeolite BETA as an Active Catalyst for Intramolecular Prins Cyclization of Citronellal

Fe-Modified Zeolite BETA as an Active Catalyst for Intramolecular Prins Cyclization of Citronellal

Prins intramolecular cyclization of citronellal giving desired product isopulegol was performed using different modified zeolites BETA (Si/Al ratio 25, 38 and 75 modified with iron or zinc of 1, 5 or 10 wt.% by wet impregnation method). In case of materials BETA Si/Al 38 and 75 led material impregna...

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Veröffentlicht in:Catalysis letters 2021-07, Vol.151 (7), p.1993-2003
Hauptverfasser: Vrbková, Eva, Prejza, Tomáš, Lhotka, Miloslav, Vyskočilová, Eliška, Červený, Libor
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Citronellal
Impregnation
Industrial Chemistry/Chemical Engineering
Iron
Organometallic Chemistry
Physical Chemistry
Selectivity
Silicon
Toluene
Zeolites
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Zusammenfassung:Prins intramolecular cyclization of citronellal giving desired product isopulegol was performed using different modified zeolites BETA (Si/Al ratio 25, 38 and 75 modified with iron or zinc of 1, 5 or 10 wt.% by wet impregnation method). In case of materials BETA Si/Al 38 and 75 led material impregnation with metal to increase of material catalytic activity (accompanied with increase of amount of weak acid sites detected using temperature programmed desorption). Material BETA 38 with loading 1 wt.% of Fe provided 97% citronellal conversion and 94% selectivity of isopulegol formation (90 °C, toluene, 24 h). Graphic Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-020-03456-w