FIELD: chemistry.
SUBSTANCE: invention relates to a process for the preparation of calcium carbonate nanoparticles in a slurry based on an aqueous solvent. Method includes treating inorganic calcium carbonate particles or agglomerates thereof in said solvent at a solids content of 30-75 % by weight by adding 0.1–8 % by weight of dispersing agent(s) and performing ultrasonic treatment in a concentrated slurry. Intensity of ultrasonic treatment is 10–500 W/cm2. Dispersing agents are selected from a group of surface-active polymers consisting of polycarboxylates, polyacrylates, polyesters, fatty acid derivatives and mixtures thereof.
EFFECT: enabling to obtain a stabilised and dispersed concentrated slurry with a particle diameter of 50–200 nm.
6 cl, 4 dwg, 1 tbl, 4 ex
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