Isomerization of α-pinene oxide to campholenic aldehyde in the presence of Al-SiO2 and magnetic Al-SiO2/Fe3O4 catalysts

In the present work, we demonstrated synthesis of Al-SiO 2 and magnetically recoverable Al-SiO 2 /Fe 3 O 4 systems via grafting of triethylaluminum on SiO 2 and SiO 2 -coated magnetic Fe 3 O 4 nanoparticles, respectively. These materials were characterized by various techniques including elemental a...

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Published inReaction kinetics, mechanisms and catalysis Vol. 130; no. 2; pp. 919 - 934
Main Authors Panchenko, V. N., Kirillov, V. L., Gerasimov, E. Yu, Martyanov, O. N., Timofeeva, M. N.
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.08.2020
Subjects
Catalysis
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Physical Chemistry
Magnetic nanoparticle
Campholenic aldehyde
Lewis acidity
Al-containing silica
Isomerization
α-Pinene oxide
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Summary:In the present work, we demonstrated synthesis of Al-SiO 2 and magnetically recoverable Al-SiO 2 /Fe 3 O 4 systems via grafting of triethylaluminum on SiO 2 and SiO 2 -coated magnetic Fe 3 O 4 nanoparticles, respectively. These materials were characterized by various techniques including elemental and N 2 -adsorption/desorption analyses, transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FTIR) using CO and pyridine as probe molecules. Amount of grafted Al on the support was found to affect the textural, acid–base properties and catalytic behavior in the isomerization of α-pinene oxide (PO) to campholenic aldehyde (CA). Maximal activity and selectivity towards CA was observed in the presence of sample with 12 wt% of alumina. It was demonstrated that 12%Al-SiO 2 /Fe 3 O 4 can be used as catalyst for at least four successive cycles without loss of activity.
ISSN:1878-5190
1878-5204
DOI:10.1007/s11144-020-01811-x