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Information × Registration Number 0216U010293, 0115U005230 , R & D reports Title Development of Zr, Sn-containing hierarchically porous zeolite catalysts for synthesis of unsymmetrical ethers from 4-methoxybenzyl aldehyde and aliphatic alcohols popup.stage_title Head Popovych Nataliia Oleksiivna, Registration Date 28-12-2016 Organization L.V.Pysarzhevsky Institute of Physical Chemistry of National Academy of Science of Ukraine popup.description2 A series of hierarchically porous zeolites with BEA and MTW structure was synthesized. It was shown that the morphology and textural characteristics of the samples are determined by the structure of the template. Introduction of second heteroelement (Al) in the crystal lattice of hierarchical Sn- and Zr-containing zeolites leads to increase in conversion of 4-methoxybenzyl aldehyde to 75%. This is caused by the formation of Bronsted acidic centers (during isomorphic incorporation of Al3+ in the lattice), which presumably promote second stage of the tandem-process - esterification of 4-methoxybenzyl alcohol. Increasing of Si/Zr ratio in the reaction mixture at zeolite synthesis stage (from 55 to 120 with the same template and at one Si/Al ratio) enhances the concentration of Lewis acidic sites (formed by Zr4+) and correspondingly increases the conversion of 4-methoxybenzyl aldehyde.5481 Product Description popup.authors Курмач Михайло Миколайович Ларіна Ольна Вікторівна Попович Наталія Олексіївна popup.nrat_date 2020-04-02 Close