FIELD: chemistry.
SUBSTANCE: invention relates to chemistry. Aluminium hydroxide sol is treated in a coaxial electrolysis cell with anode current density of 300-500 A/m2. The surface area of the anode of the electrolysis cell is greater than the surface area of the cathode by not less than two orders. The anode used is VT1-0 titanium with a ruthenium-titanium oxide coating and the cathode is X18H10T steel. The obtained precipitate is held in the mother solution. Aluminium oxide is obtained from the obtained finely dispersed aluminium hydroxide by thermal treatment at 500-550°C.
EFFECT: invention simplifies the process, enables to obtain finely dispersed aluminium hydroxide with a monophase bayerite structure and aluminium oxide from said aluminium hydroxide with particle size not greater than 500 nm.
2 cl, 1 dwg, 2 tbl, 3 ex
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