FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. To obtain calcium carbonate calcium oxide-containing material is brought in contact with carbon dioxide in water medium in a series of carbonisation installations. First, carbonisation of calcium oxide-containing material is carried out in first carbonisation installation in water suspension with pH value higher than 11.0 with obtaining calcium carbonate in water suspension. After that, effluent, formed by water suspension with pH higher than 11.5, containing calcium carbonate and calcium hydroxide, is extracted from first carbonisation installation. Then, carbonisation of calcium hydroxide, contained in extracted effluent, is realised on second carbonisation installation with obtaining calcium carbonate suspension with pH value lower than 6.9.
EFFECT: invention makes it possible to obtain both monodisperse particles with narrow molecular-weight distribution and multidisperse particles with wide molecular-weight distribution in a single process from one and the same initial material.
32 cl, 11 dwg, 6 ex
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