FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. The composite material is obtained by reacting iron chloride solution with sodium hydroxide in the presence of short fibrillated cellulose fibres to form a dispersion of a product which is thickened by floatation to obtain floatation sludge. The fibrillated cellulose fibres contain, in wt %, at least 94% fibres with thickness of not more than 1.23 mm and at least 54% fibres with length of not more than 0.63 mm, which are present in the liquid medium in amount of 100-300 mg/dm3.
EFFECT: invention enables to obtain a composite material with iron hydroxide particles, coloured in different shades of brown and having bactericidal and ferromagnetic properties.
3 cl, 5 ex
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