CATALYST FOR DIESEL MOTORS EXHAUST PURIFICATION BY OXIDATION Russian patent published in 1994 - IPC

FIELD: chemical industry. SUBSTANCE: product is catalyst with composition, calculated in g per 1 dm³ of catalyst volume: metals of platinum group make 0.35 - 2.83, vanadium monoxide - 1.0 - 10.0, filler - 60.0 - 200.0, where metals of platinum group - platinum or palladium or their combination - make 1-2 : 1-3 or platinum or palladium in combination with iridium or rhodium in ratio of 5 : 1, filler is aluminum oxide or titanium dioxide or their combination with silicon dioxide or zirconium dioxide or with mordenite in ratio from 20-30 to 10-80. Carrier - cordierite or silicon or metal. In the case all components are located on wall of through free canals of monolithic or made in the form of salt of carrier and active components are applied on surface of carrier by simultaneous or in series in any turn its impregnations with solutions of combinations of vanadium or metals of platinum group with following drying and thermal treatment in stream of hydrogen containing gas or in air. In the case impregnations are carried out before or after filler application with intermediate drying and thermal treatment during sequential application of components and with carrier density of 62 cells/cm². EFFECT: increase of catalyst stable activity during conversion of hydrocarbons and carbon oxide under low temperatures and delaying oxidizing action relatively to NO and SO₂. 2 cl, 5 tbl