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US 2026/0015294 A1Published application
Fertilizer comprising immediate- and slow-release agents in soil complex nutrients
AssigneeSabic Agri-Nutrients Company
InventorsAghaddin MAMEDOV, Mohamed AL-RABHI
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Abstract
Disclosed is a fertilizer containing a mixture containing one or more of potassium phosphate, calcium sulfate, magnesium ammonium phosphate, and calcium ammonium phosphate. Methods of making and using the fertilizer granule are also disclosed.
Claims20
A fertilizer composition comprising:
- a slow-release agent comprising calcium ammonium phosphate (CaNH4PO4), magnesium ammonium phosphate (MgNH4PO4), or a combination of CaNH4PO4 and MgNH4PO4;
- an immediate-release agent comprising calcium sulfate (CaSO4), potassium phosphate (K3PO4), and/or magnesium sulfate (MgSO4).
A method of producing a fertilizer composition, the method comprising the steps of:
- (a) contacting CaO, MgO, MgCO3, CaCO3, and/or dolomite with phosphoric acid (H3PO4) to generate a first reaction product comprising calcium hydrogen phosphate (CaHPO4) and/or magnesium hydrogen phosphate (MgHPO4);
- (b) contacting the first reaction product with an ammonia source to generate a second reaction product comprising CaNH4PO4 and/or MgNH4PO4;
- (c) contacting potassium hydroxide (KOH) with H3PO4 to generate a third reaction product comprising K3PO4;
- and
- (d) combining the second reaction product, the third reaction product, and CaSO4 to generate the fertilizer composition.
2 more elements
Dependencies are inferred from the claim text.