Process for preparing zirconium-cerium-based mixed oxides

A process for preparing zirconium-cerium-based mixed oxides which comprises reacting an alkali with an aqueous solution of a zirconium salt containing 0.42-0.7 mole of sulphate anion (SO42-) per mole of zirconium cation at a temperature of not greater than 50° C., in the presence of a cerium salt to...

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Bibliographic Details
Main Authors NORMAN COLIN, EDWARDS GAVIN, TAKAO YASUHIDE, CHISEM IAN
Format Patent
LanguageEnglish
Published 07.10.2008
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
CONCRETE
INORGANIC CHEMISTRY
LIME, MAGNESIA
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
REFRACTORIES
SEPARATION
SLAG
THEIR RELEVANT APPARATUS
TRANSPORTING
TREATMENT OF NATURAL STONE
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Summary:A process for preparing zirconium-cerium-based mixed oxides which comprises reacting an alkali with an aqueous solution of a zirconium salt containing 0.42-0.7 mole of sulphate anion (SO42-) per mole of zirconium cation at a temperature of not greater than 50° C., in the presence of a cerium salt to form a cerium-zirconium mixed hydroxide, and then calcining the cerium-zirconium mixed hydroxide to form a mixed oxide. The mixed oxides possess good thermal stability and are essentially single phase and are suitable as promoters and catalyst supports in, particularly, automobile exhaust systems.
Bibliography:Application Number: US20040494021