High solids suspension fertilizer
AssigneeCompass Minerals USA Inc.
InventorRenil John Anthony
Life of this patent
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Abstract
High solids suspension fertilizers containing macro and micronutrients are provided herein. The fertilizers comprise at least one nutrient suspended in a liquid medium, along with a thickener and a dispersant. The liquid compositions advantageously comprise a suspension of larger fertilizer particles compared to prior art compositions, providing for a high solids content. The fertilizers are compatible with fungicide and insecticide seed treatments in coating agronomically important substrates, such as crop seed or prilled and granulated fertilizer. Also provided are methods of producing liquid fertilizers.
Claims39
A liquid fertilizer composition comprising a source of at least one nutrient suspended in a liquid medium, a thickener, a dispersant, and a solids content of at least about 20% by weight, the composition being substantially free of styrene (meth)acrylic copolymer.
A liquid fertilizer composition comprising a source of at least one nutrient suspended in a liquid medium and having an average particle size larger than about 230 mesh, the composition further comprising a thickener, a dispersant, and a solids content of at least about 20% by weight.
A method of producing a liquid fertilizer composition comprising combining a source of at least one nutrient, a thickener, and a dispersant in a liquid medium to form a liquid suspension, wherein the source of at least one nutrient is added to the liquid as solid particles without wet milling the solid particles to reduce particle size.
Dependencies are inferred from the claim text.