FIELD: production of inorganic compounds.
SUBSTANCE: invention provides mixed zirconium-cerium-based oxides characterized by thermal resistance and are suitable as promoters or catalyst supports in exhausted gas treatment system of automobiles. Preparation protein comprises reacting alkali with aqueous solution of soluble zirconium salt containing 0.42-07 mole sulfate anions per one mole zirconium cations. Reaction is conducted at temperature not higher than 50°C in presence of soluble cerium salt to form mixed cerium/zirconium hydroxide, which is then calcined to produce mixed oxide.
EFFECT: increased heat resistance an high temperature and achieved high homogeneity of crystalline phase.
13 cl, 1 dwg, 8 ex
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