MATERIAL FOR PRODUCTION OF THE CATALYST CARRIER WITH THE HIGH OXYGEN CAPACITY (VERSIONS)AND THE METHOD OF ITS MANUFACTURE Russian patent published in 2006 - IPC B01J21/06 B01J23/10 C01F17/00 C01G25/02 B01J37/03 B01D53/94 

FIELD: chemical industry; materials and the methods for the catalyst carrier manufacture.

SUBSTANCE: the invention is pertaining to the new mixed oxides produced from ceric oxide and zirconium oxide, which can used as the catalyzers or the catalyzers carriers for purification of the combustion engine exhaust gases. The mixed oxide possesses the polyphase cubical form of the crystallization and oxygenous capacity of at least 260/ micromoles of O₂ /g of the sample and the speed of the oxygen extraction of more than 1.0 mg-O₂/m²-minute, which are measured after combustion within 4 hours at the temperature of 1000°C. The invention also presents the substrate with the cover containing the indicated mixed oxide. The method of production of the polycrystallic particles of the indicated mixed ceric-zirconium oxide includes the following stages: i) production of the solution of the mixed salt which are containing, at least, one salt of cerium and, at least, one salt of zirconium in the concentration, sufficient for formation of the polycrystallic particles of the corresponding dry product on the basis of the mixed oxide. At that the indicated particles have the cerium-oxide component and zirconium-oxide component, in which these components are distributed inside the subcrystalline structure of the particles in such a manner, that each crystallite in the particle consists of a set of the adjacent one to another domains, in which the atomic ratios of Ce:Zr which are inherited by the adjacent to each other domains, are characterized by the degree of the non-uniformity with respect to each other and determined by means of the method of the X-ray dissipation the small angles and expressed by the normalized intensity of the dissipation I(Q) within the limits from approximately 47 up to approximately 119 at vector of dissipation Q, equal to 0.10 A^-1; ii) treatment of the solution of the mixed salt produced in compliance with the stage (i),with the help of the base with formation of sediment; iii) treatment of the sediment produced in compliance with the stage (ii),using the oxidative agent in amount, sufficient for oxidizing Ce⁺³ up to Ce⁺⁴; iv) washing and drying of the residue produced in compliance with the stage (iii); and v) calcination of the dry sediment produced in compliance with the stage (iv),as the result there are produced polycrystallic particles of the oxide of ceric and zirconium in the form of the mixed oxide with the above indicated characteristics. The technical result is the produced mixed oxide possesses both the high oxygenous capacitance, and the heightened speed of the oxygen return in the conditions of the high temperatures.

EFFECT: the invention ensures production of the mixed oxide manufactured from ceric oxide and zirconium oxide and possessing the high oxygenous capacitance and the heightened speed of the oxygen return in the conditions of the high temperatures.

68 cl, 21 ex, 2 dwg