FIELD: chemistry.
SUBSTANCE: invention can be used in making paint, plastic or paper. Method of producing precipitated calcium carbonate involves providing and calcination of a material containing calcium carbonate. Damping is performed with an aqueous solution of ammonium chloride of a reaction product obtained at the step of calcination. Insoluble components are separated from the obtained calcium chloride solution and it is carbonized. Precipitated calcium carbonate is separated. Before deposition the solution of calcium chloride is added with germ crystals.
EFFECT: invention enables to obtain highly pure precipitated calcium carbonate from a starting material of low quality while reducing the amount of wastes.
22 cl, 1 dwg, 5 tbl
| Title |
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