METHOD OF PREPARING IRON OXIDE CONTAINING CATALYSTS Russian patent published in 2008 - IPC B01J37/03 B01J23/80 B01J23/86 

FIELD: catalyst preparation methods.

SUBSTANCE: invention provides a method for preparing catalysts based on mixed metal oxides wherein metal is selected from Fe, Ni, Al, Cu, Co, Zn, Cr and mixtures thereof. Method comprises (i) dissolving metals in nitric acid resulting in acidic solution containing products in the form of mixed metal nitrates, to which aluminum may be added either in the form of nitrate or in the form of hydroxide; (ii) adding carbohydrate and/or amino acid; (iii) decomposing acidic solution at 250 to 700°C in presence of freely accessing oxygen into iron oxide and NO_x by way atomizing solution onto inner surface of one or several rotary ovens, into calcined on atomization fluidized bed, into tower furnace, or conveyer furnace with steel constringent belt; and optionally (iv) regenerating thus formed NO_x into concentrated nitric acid and returning it to the step (i).

EFFECT: enlarged surface area of synthesized powder and increased yield of product due to reduced loss of material during preparation process.

5 cl, 9 ex