Zinc oxide coated urea
AssigneeMississippi Chemical Corporation
InventorsGerald L. Tucker, Elmer Ladelle Blanton
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Abstract
Urea particles uniformly coated with zinc oxide having excellent adherence and uniformity of the zinc oxide coating are obtained by using a zinc oxide composition characterized by having a purity of 90 to 99% zinc oxide and a uniform particle size of at least 90% smaller than 12 microns and at least 95% smaller than 37 microns. Outstanding coatings are obtained if the zinc oxide composition additionally contains traces of carbon, iron oxide, magnesium oxide, or calcium oxide. High zinc-content coatings of excellent uniformity and adherence may be obtained with these coating compositions.
Claims9
A fertilizer composition comprising urea particles uniformly coated with a fertilizing amount of an adherent zinc oxide composition, said zinc oxide composition characterized by having a purity of 95 to 99% zinc oxide, and a uniform particle size, with at least 90% of the zinc oxide particles less than 8 microns in diameter and at least 98% of said particles less than 37 microns in diameter.
Dependencies are inferred from the claim text.