MIXED OXIDE OF CERIUM AND ANOTHER RARE-EARTH ELEMENT WITH HIGH SPECIFIC SURFACE AREA, METHOD OF OBT

文件类型：PDF文档
文件大小：204K
FIELD : chemistry. SUBSTANCE : invention relates to a composition consisting of cerium oxide and an oxide of another rare-earth element with high specific surface area of 20 m2/g after calcination at temperature 1000°C for 5 hours. The method of obtaining the composition involves a step for preparing a medium containing a cerium compound, heating said medium, separating the precipitate from the liquid medium, adding a compound of another rare-earth element and obtaining another liquid phase, heating the obtained medium, changing pH of the reaction mixture obtained after heating to a basic pH, separating and calcining the precipitate. EFFECT : composition is effective when used as a catalyst or catalyst support at high temperatures. 12 cl, 2 tbl, 7 ex