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US 4,056,381 AGranted
Fertilizer solutions containing stabilized iron
AssigneePhillips Petroleum Company
InventorJoseph R. Kenton
Life of this patent
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Abstract
Stable fertilizer solutions containing nitrogen, phosphorus, and iron, are prepared by admixing an iron-containing component with an ammonium phosphate-containing solution, and thereafter treating the resulting product with ammonia, thereby resulting in a stabilized iron product.
Claims15
Substantially stable iron complexes comprising nitrogen, phosphorus, and iron, prepared by a process which comprises the step of:
- a. contacting a water-soluble iron salt with an ammonium polyphosphate and water in a ratio sufficient to provide at least about 1:1 phosphorus atoms:iron atoms, thereby preparing an iron polyphosphate slurry, wherein said ammonium polyphosphate contains at least about 20 weight percent of the phosphorus atoms thereof in the poly form, and
- b. thereafter reacting said iron polyphosphate slurry from said step (a) with ammonia in amount sufficient to provide a substantially stable iron complex solution.
Dependencies are inferred from the claim text.