POWDERED TITANIUM OXIDE, METHODS FOR PRODUCTION THEREOF AND USE THEREOF Russian patent published in 2020 - IPC B01J21/06 B01J23/28 B01J23/882 B01J23/883 B01J32/00 B01J35/10 C01G23/04 C02F1/30 C10G45/08 

FIELD: chemistry.

SUBSTANCE: invention relates to powdered titanium oxide which is subjected to inorganic treatment with silicon, a method for production thereof and use thereof in production of catalysts, particularly for use as photocatalysts and as carriers for catalysts for refining. Powdered catalytic material based on titanium oxide has total content of at least 90 wt. % of hydrated titanium oxide having general formula TiO_(2-x)(OH)_2x with 0< x ≤ 1 (calculated as TiO₂), and silicon dioxide, including its hydrated precursor substances (calculated in the form of SiO₂), which in dried form has specific surface area >300 m²/g and isoelectric point in range from 4.0–7.0, in which weight ratio of TiO₂/SiO₂, determined respectively for TiO₂ and SiO₂, is at least 3 and less than 30, and wherein weight percent relates to total weight of catalytic material after drying at 105 °C for at least 2 hours. Disclosed is a method of producing a powdered catalytic material based on titanium oxide, in which: a. aqueous suspension of titanium oxide hydrate particles having general formula TiO_(2-x)(OH)_2x with 0 < x ≤ 1, with average particle size of 20–500 nm, is reacted with Si-containing compound during intense stirring, wherein pH is held in the pH range of 3–9 by optionally adding an acid or base; b. pH value is optionally corrected, if necessary, to range between 4 and 7; c. obtained suspension is filtered; g. the obtained filter cake is washed with water until the filtrate has conductivity not greater than 500 mcS/cm; etc. Obtained product is dried at 105 °C for at least 2 hours. Molded article containing said material has content of 10–35 wt. % Mo, 0–6 wt. % Co and / or Ni, calculated in form of metal oxide (Mo₃, CoO and NiO), and content of titanium oxide with general formula TiO_(2-x)(OH)_2x, in which 0 < x ≤ 1, and SiO₂, per 100 wt. % and which has specific surface area of at least 80 m²/g and pore volume greater than 0.25 cm³/g, wherein weight percent relates to total weight of loaded molded articles containing titanium oxide.

EFFECT: invention titanium oxide has substantially improved catalytic properties, as well as good thermal stability.

24 cl, 3 tbl, 5 ex