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公开(公告)号：US4308048A
公开(公告)日：1981-12-29
申请号：US121184
申请日：1980-02-13
CPC分类号： C05B13/06
摘要： Embodiment No. 1. Urea phosphate prepared from wet-process phosphoric acid is heated with monopotassium orthophosphate in a mole ratio of 0.25 to 4.0 at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.Embodiment No. 2. Phosphoric acid containing 54 to 76 percent P.sub.2 O.sub.5 is heated with urea (urea:H.sub.3 PO.sub.4 mole ratio 0.5 to 2.0) and monopotassium orthophosphate (urea:KH.sub.2 PO.sub.4 mole ratio 0.25 to 4.0) at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.
摘要翻译： 实施例1：由湿法磷酸制备的磷酸尿素在130〜200℃下以0.25〜4.0的摩尔比与正磷酸单钾一起加热，形成平均链长为1.2〜2.5的多磷酸铵钾 。 将多磷酸铵钾溶解在氨水中，得到含有三种主要营养素和超过50％总植物食物的浓缩肥料溶液。 实施例2：在130〜200℃下，将含有54〜76％的P2O5的磷酸与尿素（尿素：H 3 PO 4的摩尔比为0.5〜2.0）和一磷酸一钾（尿素:KH 2 PO 4的摩尔比为0.25〜4.0）加热，形成 平均链长为1.2〜2.5的多磷酸铵钾。 将多磷酸铵钾溶解在氨水中，得到含有三种主要营养素和超过50％总植物食物的浓缩肥料溶液。
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公开(公告)号：UST996001I4
公开(公告)日：1980-07-01
申请号：US76007
申请日：1979-09-17
IPC分类号： C05B13/06
CPC分类号： C05B13/06
摘要： Embodiment No. 1. Urea phosphate prepared from wet-process phosphoric acid is heated with monopotassium orthophosphate in a mole ratio of 0.25 to 4.0 at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.Embodiment No. 2. Phosphoric acid containing 54 to 76 percent P.sub.2 O.sub.5 is heated with urea (urea:H.sub.3 PO.sub.4 mole ratio 0.5 to 2.0) and monopotassium orthophosphate (urea:KH.sub.2 PO.sub.4 mole ratio 0.25 to 4.0) at 130.degree. to 200.degree. C. to form an ammonium potassium polyphosphate having an average chain length between 1.2 and 2.5. The ammonium potassium polyphosphate is dissolved in aqueous ammonia to yield concentrated fertilizer solutions containing the three major nutrients and over 50 percent total plant food.
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公开(公告)号：US4239739A
公开(公告)日：1980-12-16
申请号：US91853
申请日：1979-11-06
CPC分类号： C01B25/28
摘要： Purified diammonium phosphate is produced by neutralizing relatively pure melamine orthophosphate, prepared from wet-process phosphoric acid, with ammonia in a hot solution of diammonium phosphate to give a slurry of melamine in concentrated diammonium phosphate solution. The liberated melamine is virtually insoluble in concentrated diammonium phosphate solutions; it is filtered from the hot mixture, washed, and recycled to produce more melamine phosphate by reaction with wet-process phosphoric acid. The hot, concentrated diammonium phosphate filtrate is cooled to precipitate purified diammonium phosphate crystals. The product is separated from its mother liquor by filtration, and the resulting filtrate is recycled to the reactor. The small amount of impurities introduced with the melamine phosphate are removed partly with the liberated melamine and partly by centrifugation of the diammonium phosphate solution. The only starting materials for the process are phosphoric acid and ammonia.
摘要翻译： 纯化的磷酸氢二铵是通过在磷酸氢二铵的热溶液中中和相对纯的正磷酸三氢钙（由湿式磷酸制备）与氨，在浓磷酸氢二铵溶液中中和三聚氰胺浆液而制得的。 释放的三聚氰胺实际上不溶于浓缩的磷酸二氢铵溶液; 从热混合物中过滤，洗涤并再循环以通过与湿法磷酸反应产生更多的三聚氰胺磷酸盐。 将热浓缩的磷酸氢二铵滤液冷却以沉淀纯化的磷酸二氢铵晶体。 通过过滤将产物与其母液分离，并将所得滤液再循环至反应器。 与三聚氰胺三聚氰胺一起引入的少量杂质被释放的三聚氰胺部分地去除，并且部分地通过离心磷酸二铵溶液去除。 该方法的唯一原料是磷酸和氨。
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公开(公告)号：US4017589A
公开(公告)日：1977-04-12
申请号：US667553
申请日：1976-03-17
CPC分类号： C05B13/06 , C01B25/28 , C01B25/405
摘要： Ammonium polyphosphates are prepared by a process which comprises heating melamine orthophosphate prepared from impure wet-process phosphoric acid in a stream of gaseous ammonia at a temperature between 150.degree. C and 210.degree. C to produce a mixture of melamine and relatively pure short-chain ammonium polyphosphates. The solid product is extracted with water to remove the ammonium polyphosphates and free the insoluble, crystalline melamine for recycle. Thus, the only starting materials consumed in the process are phosphoric acid and ammonia.
摘要翻译： 通过一种方法制备多磷酸铵，该方法包括在150-210℃的温度下，将不纯的湿法磷酸制备的正磷酸三聚氰胺加热，生成三聚氰胺和相对纯的短链铵的混合物 多磷酸盐 固体产物用水萃取以除去多磷酸铵，并游离不溶性结晶三聚氰胺进行再循环。 因此，在该方法中消耗的唯一原料是磷酸和氨。
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公开(公告)号：US4169882A
公开(公告)日：1979-10-02
申请号：US959979
申请日：1978-11-13
申请人： Richard C. Sheridan
发明人： Richard C. Sheridan
IPC分类号： C01B25/234 , C01B25/22
CPC分类号： C01B25/234
摘要： Impure wet-process phosphoric acid is treated with urea by known processes to produce relatively pure urea phosphate which is then treated with oxalic acid to give solid urea oxalate and purified phosphoric acid product. The urea oxalate is either treated with ammonia to give urea and ammonium oxalate or it is pyrolyzed to produce urea and oxamide.
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公开(公告)号：USH676H
公开(公告)日：1989-09-05
申请号：US112784
申请日：1987-10-26
申请人： Richard C. Sheridan
发明人： Richard C. Sheridan
IPC分类号： C07C273/02 , C07C275/02
CPC分类号： C07C275/02 , C07C273/02
摘要： A process for producing urea fluorosilicate, [(NH.sub.2).sub.2 CO].sub.4 .multidot.H.sub.2 SiF.sub.6, a composition eminently suitable for use as a fungicide in the prevention and control of wheat stem rust. The method involves mixing urea and fluorosilicic acid derived from by-product fluorine in a mole ratio of urea:fluorosilicate acid in the range from about 3.5:1 to about 4.5:1 and thereafter dewatering the resulting solution to produce a concentrated solution of urea fluorosilicate. Solid urea fluorosilicate is subsequently obtained by evaporation of the remaining water which is conveniently effected by introducing the resulting solution or melt to concentrator means, or alternatively into a heated, moving bed of preformed granular urea fluorosilicate.
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