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    • 4. 发明公开
    • Method and apparatus for producing nitrophosphate fertilizers
    • Verfahren und Einrichtung zur Herstellung einesNitrophosphatdüngemittels。
    • EP0039241A2
    • 1981-11-04
    • EP81301881.9
    • 1981-04-28
    • Omnia Fertilizer Limited
    • Van Schalkwyk, Pierre Lafras
    • C05B11/06
    • C05B11/06
    • A method of producing nitrophosphate fertilizers includes the steps of treating a phosphate bearing rock with nitric acid, preferably in the ratio of 2 parts by mass of acid to one part of mass of rock, to form an acidic slurry containing nitrogen compounds, water or citric acid soluble phosphate compounds and inert solid materials; feeding the slurry to a mixing chamber; ammoniating the slurry with an ammoniating agent such as ammonia in the mixing chamber and using the heat evolved in the ammoniation reaction to evaporate off any liquid present; and adding into the mixing chamber during the ammoniation step an amount of sulphuric acid sufficient to inhibit the reversion of the soluble phosphate compounds into insoluble phosphate compounds, and preferably also an amount of phosphoric acid to adjust the N:P ratio of the final product and to stabilize the nitrophosphates formed.
    • 制备硝酸磷肥的方法包括用硝酸处理含磷酸盐岩的步骤,优选以2质量份酸与一份岩石的质量比来形成含氮化合物,水或柠檬酸的酸性浆料 酸溶性磷酸盐化合物和惰性固体物质; 将浆料送入混合室; 在混合室中用氨等氨化剂对浆料进行氨化,并使用在氨化反应中放出的热量蒸发掉任何存在的液体; 并且在氨化步骤中向混合室中加入一定量的足以抑制可溶性磷酸盐化合物转化为不溶性磷酸盐化合物的硫酸,并且还优选使用一定量的磷酸来调节最终产物的N:P比, 以稳定形成的硝酸磷。