Back to results
US 2003/0115920 A1Published application
Slow-release (GSSP) fertilizer
OwnerJay W. Palmerinventor
Life of this patent
Estimating the term…
Abstract
Several compositions of matter have been discovered that can be used in the manufacture of slow-release fertilizers that contain all of the essential elements needed by plants and humans. Slow-release fertilizers manufactured with these formulations can be used on mineral stressed soils to increase the quality and production of food crops grown on them.
Claims23
A slow-release fertilizer comprising:
- a) a mixture comprising monocalcium phosphate, dicalcium phosphate, gypsum, and magnesium sulfate;
- b) dolomitic phosphatic clay slime comprising micro and trace essential elements;
- c) urea;
- and
- d) potassium chloride.
2 more elements
A method for preparing a slow-release fertilizer comprising:
- a) preparing a first mixture by mixing a phosphate ore with sulfuric acid and water to form monocalcium phosphate, gypsum, magnesium sulfate, and residual phosphate ore;
- b) adding to the first mixture micro and trace essential elements and dolomitic phosphatic clay slime to yield a second mixture;
- c) heating the second mixture to yield a third mixture comprising dicalcium phosphate and residual phosphoric acid;
- d) adding phosphate to the third mixture to neutralize the residual phosphoric acid to yield a fourth mixture;
- e) adding urea and potassium chloride to form a fertilizer mixture;
- and
- f) drying the fertilizer mixture.
4 more elements
Dependencies are inferred from the claim text.