HIGH-ACIDITY COMPOSITION BASED ON ZIRCONIUM OXIDE, TITANIUM OXIDE AND TUNGSTEN OXIDE, PREPARATION METHOD AND USE IN TREATING EXHAUST GASES Russian patent published in 2011 - IPC B01D53/94 B01J21/06 B01J23/30 C01G23/00 C01G25/00 C01G41/00 

FIELD: chemistry.

SUBSTANCE: invention relates to cleaning exhaust gases using catalytic methods. Disclosed is a composition based on zirconium oxide, titanium oxide and tungsten oxide and possibly one oxide of another element M, selected from silicon, aluminium, iron, molybdenum, manganese, zinc, tin and rare-earth metals with the following weight ratio of these different elements: titanium oxide 20-50%; tungstem oxide 1-20%, oxide of element M 1-20%, sufficient amount of up to 100% zirconium oxide. The composition is obtained by putting into a liquid medium a compound of zirconium, titanium, possibly an oxide of element M and a basic compound; adding a tungsten compound to suspension of the obtained residue, wherein the pH value is brought to 1-7; ageing the suspension obtained at the previous step; if needed, separating the residue and calcination thereof.

EFFECT: composition has acid activity and is efficient in cleaning gases from carbon oxides and nitrogen oxides.

22 cl, 9 tbl, 10 ex