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专利名称：Agent for restricting elution of phosphorus,
method for producing the same, andmethod of restricting elution of phosphorusin sludge
发明人：Kiyoharu Hamasaki,Hironobu
Hirasawa,Noboru Yamada
申请号：US10360918申请日：20030210
公开号：US200401549A1公开日：20040812
专利附图：
摘要：Calcium nitrate, which is known to have the effect of inhibiting elution ofphosphorus contained as insoluble substance in sludge in rivers, lakes and coasts in areducing environment, can be applied not by injection of an aqueous solution of calciumnitrate, but by putting it in a solid form. An agent for inhibiting elution of phosphorus isproposed which comprises calcium nitrate as the major component (10-30%), calciumcarbonate or calcium sulfate (a total of 50-90%), and stearic acid or its salt (1-20%) as ahydrophobic substance for delaying elution of the calcium salt, and sucrose fatty acidisobutyl or paraoxy isobutyl benzoate (1-20%) as a binder, and the composition ispressed in a mold into tablets or briquette. The application into sludge by use of an airgun is preferable.
申请人：HAMASAKI KIYOHARU,HIRASAWA HIRONOBU,YAMADA NOBORU
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