METHOD OF PRODUCING POWDERED MATERIAL BASED ON CARBONATED HYDROXYAPATITE AND BRUSHITE Russian patent published in 2015 - IPC A61L27/12 A61L27/32 C04B35/447 C01B25/32 

FIELD: chemistry.

SUBSTANCE: method includes mixing solutions of calcium salts and a phosphate, settling, filtering, washing from the mother solution and drying. The starting components used are calcium nitrate tetrahydrate and anhydrous disubstituted ammonium phosphate; the ratio of concentration of reagents (Ca/P) is equal to 1.00 or 1.70; the concentration of Ca(NO₃)₂ in the reaction system varies in the range of 0.010-0.050 mol/l; content of (NH₄)₂HPO₄ is calculated based on the selected ratio of Ca/P and concentration of Ca(NO₃)₂; pH is kept at 5.00-6.50. After precipitation, the obtained solid phase is held under the mother solution for 2 days at 22-25°C, filtered, washed with distilled water and dried at 80°C until complete removal of non-chemically bound water.

EFFECT: obtaining powdered material with content of components variable in a wide range.

1 tbl, 2 dwg, 2 ex