Urea fertilizer containing central volatilization inhibitor particles to reduce release of ammonia and processes for making same
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United States of America Patent
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Jun 28, 2016
Grant Date -
Sep 4, 2014
app pub date -
May 9, 2014
filing date -
Mar 25, 2010
priority date (Note) -
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Abstract
A urea fertilizer having reduced ammonia volatilization upon application to soil including a central particle having an outer surface and comprising ammonia volatilization inhibiting compounds containing one or more of boron and iodine, and a coating of urea on the outer surface of the central particle, and further a process of making the fertilizer including the steps of: granulating ammonia volatilization inhibiting compounds containing one or more of boron and iodine, with a binder to produce volatilization inhibitor particles; screening the inhibitor particles to a preselected particle size; spraying melted urea onto the surface of the inhibitor particles to produce a coating on the inhibitor particles; granulating the coated inhibitor particles with sprayed melted urea to produce granules of urea coated central volatilization particles; and cooling the granules.
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