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1. 发明公开

EP0237775A2 Stable ammonium Polyphosphate liquid fertilizer from merchant grade phosphoric acid 失效
标题翻译： Stabilesflüssiges聚氨酯聚氨酯（DüngemittelaushandelsüblicherPhosphor）。
公开(公告)号：EP0237775A2
公开(公告)日：1987-09-23
申请号：EP87101881.8
申请日：1987-02-11
申请人： AMERICAN PETRO MART, INC.
发明人： William, Thomas P. , William, Lawton S.
IPC分类号： C05B13/06 , C01B25/40
CPC分类号： C05B13/06
摘要： 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.
摘要翻译：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。

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