HYDROPHOBISATED CALCIUM CARBONATE PARTICLES Russian patent published in 2015 - IPC D21C9/08 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of reducing resinous contaminants in an aquatic medium, formed during paper production or pulping, the method including the following steps: a) obtaining an aquatic medium containing resinous contaminants, obtained during paper production or pulping; b) preparing fine calcium carbonate and/or precipitated calcium carbonate; c) preparing a hydrophobisation agent; d) contacting the fine calcium carbonate and/or precipitated calcium carbonate from step (b) with the hydrophobisation agent from step (c) to obtain hydrophobisated fine calcium carbonate and/or hydrophobisated precipitated calcium carbonate; and e) contacting the aquatic medium from step (a) with the hydrophobisated fine calcium carbonate and/or hydrophobisated precipitated calcium carbonate from step (d); to the use of the hydrophobisated fine calcium carbonate and/or hydrophobisated precipitated calcium carbonate to reduce the amount of resinous contaminants in the aquatic medium, as well as to hydrophobisated fine calcium carbonate and/or hydrophobisated precipitated calcium carbonate and a composite of hydrophobisated fine calcium carbonate and/or hydrophobisated precipitated calcium carbonate and resinous contaminants.

EFFECT: improved properties.

28 cl, 10 dwg, 5 tbl