FIELD: chemistry.
SUBSTANCE: invention relates to chemistry and can be used to produce powdered aluminium hydroxide and aluminium oxide. According to the first version, hydrargillite undergoes thermochemical and/or mechanochemical activation. The activation product is washed on a press filter at pH less than 9 and water is then added to the washed activation product in ratio solid:liquid equal to 1:(8-10). The obtained suspension is spray dried at 170-200°C. In the second version, the activation product is plasticised at pH 2-3 and temperature 140-160°C and water is then added to the plastification product until achieving solid:liquid ratio in the suspension of 1:(7.5-15), and the suspension is taken for spray drying at temperature 180-210°C. Aluminium hydroxide powder obtained using said method is annealed at temperature 450-650°C.
EFFECT: invention enables to obtain products of different phase composition.
5 tbl, 1 dwg, 16 ex
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