FIELD: metallurgy.
SUBSTANCE: invention can be used in chemical industry. Method for treating silicate material comprises steps of preparing a first composition by reaction at a temperature of 500 to 1200°C of an alkali metal carbonate compound with magnesium silicate and contacting the first composition with water to obtain a second composition comprising amorphous magnesium silicate hydrate (M-S-H); and a step of isolating or preparing magnesium oxide, magnesium hydroxide or alkali metal silicate from the second composition. Molar ratio of the alkali metal carbonate compound, expressed as an alkali metal oxide of formula R2O, where R is an alkali metal, to magnesium silicate, expressed as silica of formula SiO2, ranges from 4:1 to 1:4.
EFFECT: present invention enables to treat a magnesium silicate based mineral with chemical absorption of carbon dioxide and obtain useful products.
9 cl, 2 dwg, 15 ex
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