METHOD OF PRODUCING ALUMINIUM OXIDE NANOCRYSTALS Russian patent published in 2011 - IPC C01F7/02 B82B3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to inorganic chemistry, particularly to a method of producing aluminium oxide nanocrystals. An aluminium compound is mixed with cellulose in water until formation of a homogeneous disperse phase. The disperse phase is filtered and heated to 500-850°C. The obtained aggregated aluminium oxide is put into an autoclave where it undergoes hydrothermal processing in an acidic medium containing an aqueous solution of an acid with concentration of 0.08-2.20 wt %, at temperature 180-220°C for 4-26 hours. The obtained nanosized boehmite is dried and annealed at 800-850°C for 2-3 hours. The aluminium compound is selected from aluminium chloride, nitrate, sulphate or hydroxide. The aluminium compound is mixed with cellulose in weight ratio of 1:1.3-2.0, respectively.

EFFECT: invention enables to obtain a homogeneous phase of non-aggregated non-crystalline aluminium oxide with grain composition in which the predominant particle size is less than 100 nm.

3 cl, 1 tbl, 3 dwg, 5 ex