发明名称 |
METHOD OF REMOVING PHOSPHORUS-CONTAINING WASTE RESULTING FROM PREPARATION OF OMEGA-AMINO-(C<SB>2</SB>-C<SB>6</SB>) ALKYLIDENE- 1-HYDROXY-1,1-BISPHOSPHONIC ACID SALTS, AND DEPOSITED MIXTURE OF CALCIUM-AND PHOSPHORUS-CONTAINING SALTS |
摘要 |
FIELD: chemical industry. SUBSTANCE: claimed method comprises (a) contacting aqueous medium after separation of omega-amino (C<SB>2</SB>-C<SB>6</SB>) 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 |
申请公布号 |
RU2126415(C1) |
申请公布日期 |
1999.02.20 |
申请号 |
RU19970100167 |
申请日期 |
1995.06.02 |
申请人 |
MERK EHND KO., INK. |
发明人 |
EHDAMANAL S.VENKATARAMANI;EHNDRJU L.FORMAN;RAL'F DZH.MAGLITT;DONAL'D MAKKINI |
分类号 |
C02F1/52;C02F101/30;C02F103/36;C07F9/38 |
主分类号 |
C02F1/52 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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