Florol synthesis via Prins cyclization over hierarchical beta zeolites

Autor
Shcherban, Nataliya
Barakov, Roman
Lasne, Basile
Datum vydání
2022Publikováno v
Molecular CatalysisRočník / Číslo vydání
531 (October)ISBN / ISSN
ISSN: 2468-8231Metadata
Zobrazit celý záznamKolekce
Tato publikace má vydavatelskou verzi s DOI 10.1016/j.mcat.2022.112683
Abstrakt
A set of hierarchical beta zeolites with variable Si/Al ratios, nanoparticle sizes, textural and acidic properties was prepared using a hydrothermal treatment of a concentrated alkali metal-free protic acid-containing zeolite gel-precursor. The obtained catalysts were investigated in the Prins cyclization of isovaleraldehyde with isoprenol yielding a commercially valuable tetrahydropyranol (Florol). The highest yield of the desired product (55.4%) was achieved over a zeolite catalyst possessing moderate acidity, developed mesoporosity (V(meso) 0.60 cm3/g) and a high external surface area (290 m2/g). Preferable formation of substituted tetrahydropyranol over weak- and medium-strength Bronsted acid sites, on the one hand, and generation of the undesired dehydration products mainly over strong Bronsted acid sites, on the other hand, occurring in parallel routes were supported by the kinetic analysis of the reaction network.
Klíčová slova
hierarchical zeolite, Prins cyclisation, tetrahydropyranol, Florol, acid sites
Trvalý odkaz
https://hdl.handle.net/20.500.14178/1812Licence
Licence pro užití plného textu výsledku: Creative Commons Uveďte původ 4.0 International