Inshina O. Synthesis and catalytic properties of strongly acidic ZrO2-SiO2 and ZrO2-SiO2-Al2O3 oxides

Mixed ZrO2 - SiO2 and ZrO2 - SiO2 - Al2O3 oxides; tetrahydrofuran oligomerization reaction, acetylation and transesterification of methyl tert-butyl ether, 1,1-diethoxyethane transacetalization and cracking of vacuum gas oil. Development of stable highly acidic catalysts based on ZrO2 - SiO2 and mixed ZrO2 - SiO2 - Al2O3 oxides for vacuum gas oil cracking and tetrahydrofuran oligomerization reaction, acetylation and transesterification of methyl tert-butyl ether. XRD, DTA, low-temperature adsorption-desorption of nitrogen, IR, UV-Vis, NMR, XPS spectroscopy, gas and high performance liquid chromatography. New superacid ZrO2 - SiO2 - Al2O3 oxide was synthesized and the concentration field of the acid sites formation with H0 = -14.52 was determined. A method for producing strong acid mixed ZrO2 SiO2 oxide from zircon concentrate without using other sources of Si4+ and Zr4+ ions was proposed. It was shown that zirconosilicate catalysts provide higher yield of gasoline fraction on 6 - 8 % than industrial zeolite catalyst during vacuum gas oil cracking. It is found that superacid ZrO2 SiO2 Al2O3 efficiently catalyzes the oligomerization of tetrahydrofuran at 40 оС. Field of application is acid catalysis and petrochemistry.