APPLICATION OF 2-AMINO-2-ETHYL-1,3-PROPANEDIOL AS ADDITIVE IN AQUEOUS SUSPENSIONS OF CALCIUM CARBONATE-COMPRISING MATERIALS WHILE MAINTAINING STABLE SUSPENSION CONDUCTIVITY Russian patent published in 2018 - IPC C09C1/02 

FIELD: chemistry.

SUBSTANCE: present invention relates to the field of aqueous suspensions of calcium carbonate-comprising materials and additives added thereto. Application of 2-amino-2-ethyl-1,3-propanediol as an additive to an aqueous suspension containing from 25 to 62 vol.% of the total volume of the suspension of at least one calcium carbonate-comprising material, and having pH of 8.5 to 11, the additive is contained in an amount of from 500 to 15,000 mg, preferably from 1,000 to 5,000 mg, and more preferably from 1,300 to 2,000 mg per liter of the aqueous phase of said suspension, to increase pH of the suspension by at least 0.3 pH units, the specific conductivity of the suspension is reduced by 5 to 100 mcS/cm per pH unit. Also, an application and method for increasing the pH of the aqueous suspension are described.

EFFECT: additive which reduces the conductivity of the suspension and increases the pH value is proposed.

21 cl, 3 tbl