PREPARATION OF AQUEOUS SUSPENSION OF PHOSPHATE MATERIAL Russian patent published in 2022 - IPC C01B25/01 C01B25/222 C08F20/06 C05B11/00 

FIELD: chemical industry.

SUBSTANCE: method for the preparation of at least one phosphate material includes dispersion in water of particles of phosphate material, a size of which is in a range from 10 to 400 mcm, in the presence of at least one anionic polymer having mass molecular weight (M_W) in a range from 1000 to 90,000 g/mol. Anionic polymer is obtained using a reaction of polymerization of at least one acid selected from acrylic acid, methacrylic acid, and salts thereof. Amount by weight of used anionic polymer is in a range from 0.05 to 5% per the amount of phosphate material. Brookfield viscosity of the resulting aqueous suspension, measured 90 s after preparation, at 25°C, at 100 rev/min, and at a concentration of phosphate material of more than 45% by weight, is less than 1500 MPa·s. An aqueous suspension of at least one phosphate material and a method for conditioning of phosphate material in the form of an aqueous suspension are also proposed.

EFFECT: inventions allow for obtainment of stable suspensions of phosphate material of a high concentration with a controlled viscosity, increase in the yield in subsequent preparation of phosphoric acid.

25 cl, 9 tbl, 2 ex