Patent ID: 7939041
Filing Date: 2011-05-10
Classification: B01J,C01G,C01P

Abstract:
1. A composite comprising, on an oxide basis, 42-70 wt % Al 2 O 3 , 10-48 wt % ZrO 2 , 2-34 wt % CeO 2 and 0-9 wt % REOs other than CeO 2 and having the following properties after heating to 850° C. over four hours and holding at 850° C. for four hours then allowing to cool to ambient temperature: a surface area after aging at 950° C. for 2 hours equal to or greater than 60 m a surface area after aging at 1100° C. for 2 hours equal to or greater than 30 m and having a sulfate ion content less than 0.05 percent by mass, a chloride ion content less than 200 ppm and a sodium ion content of less than 200 ppm, all on a dried oxide weight basis.