METHOD OF PRODUCING DEPOSITED CALCIUM CARBONATE USING LOW-CHARGE POLYMER CONTAINING ACRYLATE AND/OR MALEATE Russian patent published in 2014 - IPC C09C1/02 C01F11/18 

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of producing precipitated calcium carbonate includes the following steps: (i) providing a calcium source in form of CaO, which is optionally partially or completely slaked; (ii) providing a gas containing CO₂; (iii) contacting said calcium source and said gas containing CO₂, in an aqueous medium in a reactor; (iv) obtaining a suspension containing precipitated calcium carbonate; (v) optionally concentrating said suspension containing precipitated calcium carbonate; (vi) optionally adding dispersant additives to the suspension at step (iv) and/or (v); (vii) optionally milling the product at step (iv), (v) or (vi). At least one polymer is present at step (iii).

EFFECT: increasing capacity of producing precipitated calcium carbonate by cutting carbonisation time.

22 cl, 2 dwg, 1 tbl