Compounds in Mixed Nitrate Fertilizers and Their Behavior
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Reaction and properties of compounds in NE4N08-KNO3-K2S0A-(NH, )2SO4 system were investigated in order to study changes during storage of granular mixed fertilizers containing nitrate and sulfate. Among the samples of Table 1, S-1 tends to degrade while S-2 and F-1 cake. It has been found that a compound "B" NH4, (NO3) 2SO4 decomposes into nitrate and sulfate by heating at 80°C or 100°C under the presence of moisture as in the granulation and drying steps of the production (Table 2). During storage at room temperature, the nitrate and sulfate react to form "B" following the equations ( 1 ) and ( 2 ). The reaction ( 1), which col-respond to S-1, causes volume increase by 3.2% with heat emission resulting in the degradation of the granules. Minor volume decrease occurres with the reactions ( 2 ) and ( 3) which correspond to the samples 71 and S-2 respectively. Crystals of "B" formed on the surface of the granules of F-1 and caused the caking. A considerable amount of potassium chloride remained unreacted in the product of S-2; the chloride slowly reacted with ammonium nitrate during storage to form potassium nitrate and ammonium chloride resulting in the caking.
- 公益社団法人 日本化学会の論文
公益社団法人 日本化学会 | 論文
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