食塩と水蒸気の反応を利用する燐鉱石の分解(第3報) : 燐酸を用いる方法の製造条件及び肥効試験の結果

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1. Manufacturing conditions of phosphatic fertilizers utilizing reaction between sodium chloride and water vapor were studied. The proper quantity of phosphoric acid and sodium chloride to be added to the phosphate rock were determined as that the mol ratio of P_2O_5 : CaO : Na_2O of the whole mixtures were 1 : 2〜2.3 : 0.6〜0.8. When proper concentrations of phosphoric acid were used, the products became granules of diameter 1〜3 mm. 2. 1150℃ was necessary when potassium sulfate, sodium sulfate were used instead of sodium chloride. When potasium chloride only was used, the products were less soluble, but mixtures of sodium chloride and potassium chloride were used, results were satisfactory. 3. The manurial effects of products using KITADAITO phosphate rock and phosphoric acid were both better than superphosphate using Allyphatic Soil by WAGNER's Pot Experiment. 4. Fluorine was volatilized almost completely, and so it may be useful as animal feed also.
社団法人日本土壌肥料学会の論文
1954-12-15