Compacted muriate of potash fertilizers containing micronutrients and methods of making same
AssigneeThe Mosaic Company
InventorsDel Ferguson, Ronald Olson, Carey Heinbigner
Life of this patent
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Abstract
A granular cohered MOP fertilizer having one or more micronutrients, and one or more binding ingredients. The fertilizer is prepared by compacting MOP feed material with a source of zinc and one or more optional binders to form a cohered MOP composition. The cohered MOP composition is then further processed, such as by crushing and sizing, to form a cohered granular MOP product containing a source of zinc. The process yields a fertilizer product containing micronutrients with superior elemental and granule size distribution without compromising handling or storage qualities.
Claims19
A cohered and compacted potash fertilizer product comprising a plurality of fertilizer granules, each granule comprising:
- a source of potassium chloride;
- a source of zinc compacted with the source of potassium chloride, wherein the source of zinc provides zinc in an amount from about 0.001 to about 10 weight percent of the product;
- and
- a phosphate-containing binding agent.
A method of producing a cohered product containing micronutrients comprising:
- combining potassium chloride, a phosphate-containing binding agent, and a source of zinc to form a composition, wherein the source of zinc is added in an amount such that the composition contains zinc in an amount of about 0.001 weight percent to about 10 weight percent;
- compacting the composition;
- and
- crushing the compacted composition into granules to produce the cohered product.
Dependencies are inferred from the claim text.