Producing alumina granules in a fluidized bed
 The process of the present invention for preparing granules of alumina includes pretreating an alumina powder by admixing with cold water in a mixer at a temperature below room temperature, e.g., such as below about 20.degree. C., to form a pretreated alumina having a pore volume saturated with water and further having a surface area of gel structure, and agglomerating the pretreated alumina in a fluidized bed to form granules. The process is particularly suited to producing activated alumina in macroporous granules. The process in one aspect further includes a cold hopper for cooling alumina powder prior to the pretreating step. 
Aluminum Company of America
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Hisashi O. Alan Ching-Chung Hubert L. Jon F. Chin-Liang
Kono Pearson Huang Fleming Edd Chou