Effect of Production Conditions of Hierarchical SnAl-BEA Zeolites on Their Acidity and Catalytic Activity in Tandem Process for the Production of 4-Methoxybenzyl-sec-Butyl Ether

Hierarchical SnAl-silicate zeolites of the BEA structural type with Lewis (up to 130 μmol/g) and Bronsted (up to 330 μmol/g) acid sites, the concentration of which according to diffuse reflectance and X-ray photoelectron spectroscopy increases with increase of the charge of the hydrophilic part of the employed templates and also the Al3+ and Sn4+ contents, were obtained. In the catalytic tandem process in the presence of the obtained zeolites 89%-99% selectivity for 4-methoxybenzyl-sec-butyl ether and 36% conversion for anisaldehyde are obtained.