PROCESS FOR PRODUCTION OF POTASSIUM HYDROXYLAPATITE Russian patent published in 1994 - IPC

FIELD: inorganic chemistry, particularly, manufacture of material which is inorganic component of human being's osseous and dental tissues. SUBSTANCE: inorganic material may find application in production of filling materials, prostheses and such cosmetics as powders, tones, deodorants, etc. . New process prescribes solid-phase synthesis of starting admixture including oxygen-containing compounds of calcium (Ca) and phosphorus (P). Starting admixture must be taken with certain deviation from stoichiometric composition (1,670 ≅ Ca/P≅ 1,700). Thus prepared material is to be washed in distilled water. Process for manufacture of said inorganic material prescribes using such reagents as CaO, CaCO₃ and calcium or ammonium phosphates including Ca₂P₂O₇, CaHPO₄·2H₂O, CaHPO₄, Ca(H₂PO₄)₂, Ca₃(PO₄)₂,Ca(H₂PO₄)₂·H₂O , (NH₄)₃PO₄, (NH₄)₂HPO₄, (NH₄)H₂PO₄. EFFECT: this process allows reproduction of single-phase hydroxylapatite free of phosphorous inclusions. 1 tbl