Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof
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United States of America Patent
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Jan 23, 2001
Grant Date -
N/A
app pub date -
Jul 21, 1998
filing date -
Oct 27, 1995
priority date (Note) -
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Abstract
The invention relates to a method for making NK-fertilizers basically from calcium nitrate fertilizers and potassium nitrate and homogeneous NK-fertilizer products. Calcium nitrate fertilizer is melted together with potassium nitrate to form a melt or suspension thereof which is particulated to form a homogeneous NK-fertilizer. The calcium nitrate fertilizer and the potassium nitrate are melted at 90-120.degree. C. and then heated to the desired particulation temperature being 160-190.degree. C. for prilling and 90-140.degree. C. for granulation. The components are mixed in ratios giving a melt or suspension comprising 40-14 weight % calcium nitrate, 55-85 weight % potassium nitrate, 0.5-6 weight % water, 0-4 weight % ammonium nitrate and 0-5 weight % magnesium nitrate.
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