Composite oxide and method for producing the same

By preparing composite oxides containing cerium, zirconium, aluminum, and optional rare earth metal elements, and treating them at high temperatures to improve their heat resistance and oxygen storage capacity, the problem of insufficient heat resistance of existing composite oxides in high-temperature waste gas was solved, and effective oxide catalyst performance at high temperatures was achieved.

CN116600893BActive Publication Date: 2026-06-02MITSUI MINING & SMELTING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MITSUI MINING & SMELTING CO LTD
Filing Date
2021-11-17
Publication Date
2026-06-02

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Abstract

The present invention aims to provide a cerium oxide (CeO2)-zirconium oxide (ZrO2)-aluminum oxide (Al2O3) composite oxide having improved heat resistance and a method for producing the same, and to provide a composite oxide containing cerium element, zirconium element, aluminum element, and optionally a rare earth metal element other than cerium element, and having a specific surface area of 60 m 2 / g or more as measured by the BET method after heat treatment at 1000°C for 25 hours in the atmosphere.
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