Water insoluble polyphosphate fertilizers
OwnerChandrika VARADACHARIinventor
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Abstract
Fertilizer compositions for micronutrients and phosphates based on polyphosphate compositions of Zn, Fe, Mn, Cu, B and Mo and basic cations Ca, Mg, K and NH4+ that have narrowly defined range of chain lengths for optimized performance, low water soluble phosphorous and high levels of solubility in 0.1N NaHCO3 and Morgan's extractant.
Claims28
A polyphosphate composition comprising a basic cation selected from the group consisting of calcium, magnesium and combinations thereof and, optionally, a basic cation selected from the group consisting of K and NH4+, and at least 0.1 wt %, combined total, of one or more micronutrients selected from the group consisting of Zn, B, Mn, Cu, and Mo wherein (i) the polyphosphate composition comprises 30 wt % to 60 wt % orthophosphate, (ii) has a number average chain length including orthophosphate (ñ′) of 1.5 to 2.2, and (iii) has a fraction of phosphorous in the polyphosphate composition that is soluble in a Morgan Assay of at least 50 wt % of the total amount of phosphorous in the polyphosphate composition.
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A polyphosphate composition comprising calcium as a basic cation and optionally one or more basic cations selected from the group consisting of Mg, K and NH4+, and at least 0.1 wt %, combined total, of one or more micronutrients selected from the group consisting of Zn, Fe, B, Mn, Cu, and Mo wherein (i) the polyphosphate composition comprises 30 wt % to 60 wt % orthophosphate, (ii) has a number average chain length including orthophosphate (ñ′) of 1.5 to 2.2, and (iii) has a fraction of phosphorous in the polyphosphate composition that is soluble in a Morgan Assay of at least 50 wt % of the total amount of phosphorous in the polyphosphate composition.
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Dependencies are inferred from the claim text.