Zeolite-activated guano phosphates and a method for producing the same
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United States of America Patent
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Mar 10, 1992
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N/A
app pub date -
Apr 3, 1991
filing date -
Apr 3, 1991
priority date (Note) -
Expired
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Abstract
Zeolite-activated guano phosphate fertilizers are produced by a method comprising grinding guano phosphates to 10 mesh granules by roughing and middling mills, heating in a rotary kiln, cooling, finely grinding to obtain 100 mesh guano phosphate powder, analyzing the content of the phosphoric anhydride in the powder, and mixing with natural zeolites to obtain zeolite-activated guano phosphates, wherein the proportion of the phosphoric anhydride is controlled at 18% by weight.
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