COMPOSITIONS BASED ON ZIRCONIUM OXIDE USED AS TERNARY CATALYSTS Russian patent published in 2020 - IPC C01F17/32 C01G25/02 B01J21/06 B01J23/10 B01J35/10 B01J37/03 B01D53/94 

FIELD: chemical or physical processes.

SUBSTANCE: invention can be used in producing triple catalytic converters (TWC) used in processing automotive exhaust gases. In a mixed cerium/zirconium oxide, the molar ratio Ce:Zr is 1 or less, content of cerium oxide is 10–50 wt %, total amount of cerium oxide and zirconium oxide is at least 80 wt %. Said mixed oxide is characterized by specific surface area of at least 18 m²/g and total pore volume, measured by physical adsorption method N₂, at least 0.11 cm³/g after aging at 1100 °C in air for 6 hours. Mixed oxide has a specific surface area of at least 42 m²/g and a total pore volume, measured by physical adsorption N₂, at least 0.31 cm³/g after aging at 1000 °C in air for 4 hours.

EFFECT: invention increases heat resistance of compositions intended for use as TWC, enables to obtain catalysts capable of operating at low temperature.

22 cl, 5 dwg, 1 tbl, 15 ex