METHOD OF REMOVING PHOSPHORUS-CONTAINING WASTE RESULTING FROM PREPARATION OF OMEGA-AMINO-(C-C) ALKYLIDENE- 1-HYDROXY-1,1-BISPHOSPHONIC ACID SALTS, AND DEPOSITED MIXTURE OF CALCIUM-AND PHOSPHORUS-CONTAINING SALTS Russian patent published in 1999 - IPC

FIELD: chemical industry. SUBSTANCE: claimed method comprises (a) contacting aqueous medium after separation of omega-amino (C₂-C₆) alkylidene-1-hydroxy-1,1-bisphosphonic acid salts with calcium-chloride compound in amount of 2- 10 weight parts per 100 volumetric parts of medium; (b) contacting solution from stage (a) with calcium oxide in amount sufficient to cause deposition of calcium-and phosphorus-containing salts; contacting mixture from stage (b) with acid so as to adjust pH of aqueous portion of mixture to 6-8 and to cause deposition of said calcium-and phosphorus-containing salts; (d) separating mixture of calcium-and phosphorus-containing salts. The present invention describes deposited mixture of calcium- and phosphorus-containing salts. The resulting salts are removed by combustion, placed into soil or used as fertilizer. EFFECT: more efficient method of removal phosphorus-containing waste. 11 cl, 3 dwg, 1 ex