METHOD OF PRODUCING MATERIALS FROM CALCIUM CARBONATE WITH IMPROVED ADSORPTION PROPERTIES OF SURFACE OF PARTICLES Russian patent published in 2013 - IPC C09C1/02 C01F11/18 C09C3/06 C09C3/08 C09D1/00 C08K3/26 D21H17/69 

FIELD: chemistry.

SUBSTANCE: method of producing calcium carbonate-containing materials, the surface of particles of which has improved dispersant adsorption properties, comprises the following steps: a) producing at least one calcium carbonate-containing material in form of an aqueous suspension or in dry form; b) producing at least one lithium ion-containing compound selected from a group comprising lithium hydroxide or lithium oxide or inorganic and/or organic monomer lithium salts selected from a group comprising mono- or polybasic acid salts, e.g., lithium carbonate, lithium sulphate, lithium citrate, lithium bicarbonate, lithium acetate, lithium chloride, lithium phosphate, in dry form or in aqueous form, and mixtures thereof; c) a combination of at least one lithium ion-containing compound from step (b) and at least one calcium carbonate-containing material from step (a).

EFFECT: invention enables to obtain a calcium carbonate-containing material in dry form or in form of a suspension, having high concentration of dry substance and low Brookfield viscosity, which retains stability over time, and good pH buffering capacity.

44 cl, 2 dwg, 10 tbl, 9 ex