Polyphosphate fertilizer combinations
AssigneeAgtec Innovations, Inc.
InventorChandrika Varadachari
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Abstract
A composite particle and a population of particles comprising a water-insoluble polyphosphate composition, methods of producing, and methods of using the same are provided. The polyphosphate composition may comprise at least one alkaline earth metal selected from calcium and magnesium and optionally at least one nutrient ion selected from the group consisting of potassium, ammonium, zinc, iron, manganese, copper, boron, chlorine, iodine, molybdenum, selenium or sulfur.
Claims50
A population of composite particles having an average size of greater than 80 mesh BS, the composite particles comprising a layer of a water-insoluble, dilute acid-soluble inorganic polyphosphate polymer composition overlying a discrete inner layer of a chemically distinct composition, the inorganic polyphosphate polymer composition containing 5 to 70 wt % orthophosphate and having a number average chain length of greater than 2 but less than 50 repeat units comprising phosphate when the orthophosphate content of the polyphosphate polymer is excluded from the average chain length calculation and a number average chain length of at least 1.1 but less than 50 repeat units comprising phosphate when the orthophosphate content of the polyphosphate polymer is included in the average chain length calculation, the chemically distinct composition being a plant seed or a water-soluble macronutrient fertilizer.
A composite particle having a size greater than 0.2 mm, the composite particle comprising a water-insoluble, dilute acid-soluble inorganic polyphosphate polymer composition in solid form and a chemically distinct composition, the inorganic polyphosphate polymer composition and the chemically distinct composition being present in discontinuous regions of discrete composition in the particle, the inorganic polyphosphate polymer composition containing 5 to 70 wt % orthophosphate, and optionally one or more micronutrient metals selected from the group consisting of chromium, cobalt, copper, iron, manganese, and zinc, the inorganic polyphosphate polymer has a number average chain length of greater than 2 and less than 50 repeat units when the orthophosphate content of the inorganic polyphosphate polymer is excluded from the average chain length calculation and a number average chain length of at least 1.1 but less than 50 repeat units when the orthophosphate content of the inorganic polyphosphate polymer is included in the average chain length calculation, the repeat units comprising phosphate, sulfate, borate, molybdate, or selenate units, or a combination thereof, provided the ratio of phosphate units to the combined total of sulfate, borate, molybdate and selenate repeat units comprised by the inorganic polyphosphate composition is at least 2:1, the chemically distinct composition being a pesticide, agrichemical, macronutrient fertilizer or a plant seed.
Dependencies are inferred from the claim text.