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    • 6. 发明公开
    • Production of low-chloride alkali metal phosphates
    • Herstellung von Alkalimetallphosphaten mit niedrigem Chloridgehalt。
    • EP0530409A1
    • 1993-03-10
    • EP91307877.0
    • 1991-08-28
    • ALPINE PLANT FOOD LIMITED
    • Nguyen, Kim D.Spink, Donald R.
    • C01B25/30
    • C05B13/06C01B25/301C05B7/00C05G3/0064
    • 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.
    • 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。
    • 8. 发明公开
    • Stable ammonium Polyphosphate liquid fertilizer from merchant grade phosphoric acid
    • Stabilesflüssiges聚氨酯聚氨酯(DüngemittelaushandelsüblicherPhosphor)。
    • EP0237775A2
    • 1987-09-23
    • EP87101881.8
    • 1987-02-11
    • AMERICAN PETRO MART, INC.
    • William, Thomas P.William, Lawton S.
    • C05B13/06C01B25/40
    • C05B13/06
    • he invention relates to a stable ammonium polyphosphate liquid fertilizer prepared by reaction of ammonia with concentrated wet-process phosphoric acid having a P205 concentration of 54 to 62 weight percent, said wet-process phosphoric acid prior to concentration having been contacted with a cation exchange resin to remove magnesium and calcium without appreciable reduction of iron and aluminum, said concentrated acid still containing on a weight percent basis referenced to 60% P205: (i) 1.0% or greater iron and aluminum calculated as Fe203 and A1203, (ii) less than 0.3% magnesium calculated as MgO, and (iii) less than 0.15% total of sodium, potassium and calcium calculated as Na20, K20, and CaO, said liquid fertilizer being further characterized by remaining substantially sludge-free when stored at 25°C for 6 months without addition of any sequestering or suspending agent.
    • 本发明涉及一种稳定的多磷酸铵液体肥料,其通过氨与P205浓度为54至62重量%的浓缩湿法磷酸反应制备,所述湿法磷酸在浓缩之前已经与阳离子交换树脂 以除去镁和钙,而不明显地还原铁和铝,所述浓缩酸仍以重量百分比计,参考60%P205:(i)以Fe 2 O 3和Al 2 O 3计算的1.0%或更多的铁和铝,(ii)小于 以MgO计为0.3%的镁,(iii)以Na 2 O,K 2 O和CaO计算的钠,钾和钙的总量少于0.15%,所述液体肥料的特征还在于在25℃保存时基本上不含污泥 5个月不添加任何螯合剂或悬浮剂。