| abstract |
The present invention is an alumina agglomerate of the type obtained by dehydrating aluminum hydroxide or aluminum oxyhydroxide, agglomerating the obtained alumina, hydrothermally treating the agglomerate and firingn n n The specific surface area is 90 m 2 / g to 220 m 2 / g, preferably 100 m 2 / g to 200 m 2 / g,n n n V 37 ' is 40 ml / 100g to 65 ml / 100g, preferably 45 ml / 100g to 60 ml / 100g,n n n V 200 Hz is 12 ml / 100g or more, preferably 15 ml / 100g or more, more preferably 18 ml / 100g or more,n n n The ratio of specific surface area / V 200 mm <3> provides the alumina aggregate which is 10 or less, Preferably it is 8.5 or less, More preferably, it is 7 or less.n n n The present invention also provides a catalyst carrier, adsorbent and catalyst consisting of these aggregates.n n n The present invention also provides a method for producing this aggregate. |