In {HEAD ~ the process} a slurry of alumina, {TAIL ~ preferably a microcrystalline boehmite pseudoboehmite intermediate}, is prepared in an acidic aqueous medium and droplets of the slurry are passed through air into a column containing an upper body of water immiscible liquid and ammonia and a lower body of aqueous coagulating agent 
In { HEAD ~ the process } a slurry of alumina , { TAIL ~ preferably a microcrystalline boehmite pseudoboehmite intermediate } , is prepared in an acidic aqueous medium and droplets of the slurry are passed through air into a column containing an upper body of water immiscible liquid and ammonia and a lower body of aqueous coagulating agent
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