| 摘要 |
FIELD: chemistry.SUBSTANCE: invention can be used in the chemical industry. A method of obtaining a precipitated calcium carbonate product includes the following stages: (a) formation of a water suspension of precipitated calcium carbonate grains by carbonisation of Ca(OH)suspension in the presence of 0.005-0.03 mol Sr in the form of Sr(OH)per mol of Ca(OH)and (b) formation of the water suspension of the precipitated calcium carbonate product by carbonisation of Ca(OH)slurry in the presence of 0.5-5% of dry weight of the precipitated calcium carbonate grains. The precipitated calcium carbonate grains have D50, which is lower than D50 of the precipitated calcium carbonate product. The precipitated calcium carbonate grains also have a content of aragonite polymorph higher or equal to its content in the precipitated product - calcium carbonate.EFFECT: invention makes it possible to increase the content of aragonite polymorph in the precipitated calcium carbonate.18 cl, 2 tbl, 3 ex |
