Preparation of Active Aluminum Hydroxide and Its Use
for Production of Finely Dispersed Alumina

I. V. Loginova* and A. A. Shoppert

Ural Federal University, ul. Mira 19, Yekaterinburg, 620002 Russia

*e-mail: loginova_irina@mail.ru

Abstract—The preparation of active aluminum hydroxide from the alkali–aluminate solution of the Bayer pro-
cess with the help of aluminum salt is investigated. For this purpose the ability of the nonuniform crystal growth
at low temperatures and without stirring was used. Finally, a precipitate with a high specific surface, which is
easily soluble in acids and alkalis, is formed. The activation energy of obtaining active aluminum hydroxide is
determined experimentally. This energy constituted 155.4 kJ/mol, which points to the kinetic process mode
despite the absence of stirring. The possibility of applying active aluminum hydroxide as a seed for the produc-
tion of well-crystallized finely dispersed aluminum hydroxide powder, which can be used to fabricate alumi-
num oxide for nonmetallurgical applications is shown.

Keywords: active aluminum hydroxide, precipitation, aluminate solution, aluminum sulfate, alumina

DOI: 10.3103/S1067821214030080

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