| abstract |
Alumina agglomerates of the type obtained by dehydrating aluminum hydroxide or aluminum oxyhydroxide, agglomerating the resulting alumina, treating the agglomerates with hot water and calcining, comprising 90 m 2 / g to 220 m 2 / g range, preferably have a specific surface area in the range of 100 m 2 / g to 200 meters 2 / g, ranging from 40 ml / 100 g to 65 ml / 100 g, preferably 45 ml / 100 g to 60 ml / 100 g have a range of V 37 Å, 12 ml / 100 g or more, preferably 15 ml / 100 g or more, more preferably it has 18 ml / 100 g or more V 200 Å, 10 or less, preferably 8.5 or less, more preferably 7 or less Alumina agglomerates, having a specific surface area / V 200 ° ratio. |