PRECIPITATED ALUMINIUM OXIDE AND METHOD OF ITS PREPARATION Russian patent published in 2019 - IPC C01F7/14 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. To obtain aluminium oxide, an aluminium mixture is prepared, having pH of 3 to 4, by adding an aluminium salt containing aluminium sulphate, aluminium chloride or aluminium nitrate to an aqueous solution or water. Alumina aluminate is added to the aluminium mixture to form an embryo mixture at a rate which maintains the pH of the germinal mixture from 6.0 to 7.5. Providing germinal mixture aging. Additional amount of aluminium salt and alkali metal aluminate is added to nucleating mixture at rate providing preparation of precipitated mixture containing precipitated aluminium oxide and maintaining pH of precipitated mixture from 6.9 to 7.8. Precipitated mixture containing precipitated aluminium oxide is heated at pH increase from pH 8.8 to pH 9.3 and precipitated aluminium oxide is extracted.

EFFECT: invention enables to obtain highly porous aluminium oxide with high thermal stability and surface area.

9 cl, 1 dwg, 10 tbl, 9 ex