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1. 发明公开

EP0530409A1 Production of low-chloride alkali metal phosphates 失效
标题翻译： Herstellung von Alkalimetallphosphaten mit niedrigem Chloridgehalt。
公开(公告)号：EP0530409A1
公开(公告)日：1993-03-10
申请号：EP91307877.0
申请日：1991-08-28
申请人： ALPINE PLANT FOOD LIMITED
发明人： Nguyen, Kim D. , Spink, Donald R.
IPC分类号： C01B25/30
CPC分类号： C05B13/06 , C01B25/301 , C05B7/00 , C05G3/0064
摘要： Potassium phosphate useful as a low-chloride content fertilizer is prepared by reacting phosphoric acid, commercial or technical grade, with fertilizer-grade potassium chloride (Muriate of Potash, 60-63% K₂O) at a reaction temperature of about 130° to about 200°C and a mole ratio of phosphorus to potassium of at least about 1.3:1. The vaporization of hydrogen chloride from the reaction mixture is effected by a novel technique combining air followed by steam stripping. The reaction product is used to produce various types as well as grades of fertilizers. The procedure may be used to form sodium phosphate in analogous manner from sodium chloride, which then may be converted to trisodium phosphate or sodium tripolyphosphate. The potassium phosphate may be converted to potassium pyrophosphate by neutralization with potassium hydroxide followed by calcination.
摘要翻译：用作低氯化物含量肥料的磷酸钾是通过磷酸市售或工业级与化肥级氯化钾（Muriate of Potash，60-63％K2O）反应制备的，反应温度为约130°至约200℃ ℃，磷与钾的摩尔比至少为1.3:1。来自反应混合物的氯化氢的蒸发是通过将空气混合后进行蒸汽汽提的新技术来实现的。反应产物用于生产各种类型和等级的肥料。该方法可以用氯化钠以类似的方式形成磷酸钠，然后将其转化为磷酸三钠或三聚磷酸钠。磷酸钾可以通过用氢氧化钾中和然后煅烧而转化成焦磷酸钾。

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