Micro and mesoporous materials based on zeolite Y for the florol synthesis via the prins cyclization of isoprenol

: Demuth Pascal, Gallego-Villada Luis A., Mäki-Arvela Päivi, Majidov Ramin, Vajglová Zuzana, Kumar Narendra, Angervo Ilari, Lastusaari Mika, Eränen Kari, Murzin Dmitry Yu.

Publisher: Elsevier

: 2024

: Catalysis Today

: 114695

: 433

: 0920-5861

: 1873-4308

DOI: https://doi.org/10.1016/j.cattod.2024.114695(external)

: https://doi.org/10.1016/j.cattod.2024.114695(external)

: https://research.utu.fi/converis/portal/detail/Publication/387559568(external)

Several parents and Sn-modified microporous and mesoporous catalysts were investigated in Prins cyclization of isoprenol with isovaleraldehyde for the production of the desired cis isomer of pyranol, Florol ® using dimethylcarbonate as a solvent in the temperature range of 30–60 °C. The highest selectivity to pyranols, 70% was obtained over microporous Sn-Y-80 (number denotes SiO2/Al2O3 ratio) at 40 °C, while 64% selectivity to pyranols was obtained at 99% conversion over dealuminated H-Y-80 exhibiting mesoporosity and low Brønsted to Lewis acid ratio of 0.16. For microporous catalysts even higher BA/LA ratio and large amounts of Lewis acid sites were beneficial, as was the case for H-Y-30 modified with SnCl2, because the reaction occurred mainly on the outer surface of the catalyst.

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