Controlled release rate fertilizers and methods of making same
First Claim
Patent Images
1. A controlled release fertilizer granule comprising:
- i) an elemental sulfur and swelling clay matrix; and
ii) at least one additional fertilizer material dispersed into said matrix.
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Accused Products
Abstract
A fertilizer granule comprises:
i) an elemental sulfur and swelling clay matrix, and
ii) at least one additional fertilizer material incorporated into said matrix.
53 Citations
20 Claims
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1. A controlled release fertilizer granule comprising:
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i) an elemental sulfur and swelling clay matrix; and
ii) at least one additional fertilizer material dispersed into said matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for the preparation of a controlled release fertilizer particle comprising the steps of:
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a) preparing a liquefied mixture of sulfur and a swelling clay;
b) blending an additional fertilizer material into said liquefied mixture;
c) transferring said liquefied mixture to a granulator;
d) adding an additional fertilizer material for coating with said liquefied mixture thereby forming coated granules; and
e) collecting said coated granules of a predetermined size. - View Dependent Claims (9)
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10. A method of using a molten sulfur/clay slurry to prepare a matrix for the delivery of an additional fertilizer material, said method comprising the steps of:
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a) preparing a liquefied mixture of sulfur and a swelling clay;
b) dispersing an additional fertilizer material into said liquefied mixture. - View Dependent Claims (11)
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12. A sulfur-based slurry matrix for slowing down rate of release of an incorporated fertilizer component, said slurry comprising:
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i) molten sulfur ii) clay, and iii) ammonium sulfate fines. - View Dependent Claims (14, 15, 16, 17, 19)
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13. A method of using a sulfur-based slurry matrix to prepare a slow release fertilizer product, said method comprising the steps of:
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a) preparing a slurry of molten sulfur and a swelling clay;
b) adding to said slurry ammonium sulfate fines.
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18. A method of using a sulfur-based slurry matrix in a pastillator to form fertilizer pastilles, said method comprising the steps of:
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a) preparing a slurry of molten sulfur and a swelling clay;
b) dispersing into said slurry ammonium sulfate fines;
c) delivering said slurry containing ammonium sulfate fines to a pastillator for formation of fertilizer pastilles.
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20. A method of using a sulfur-based slurry matrix in a falling curtain granulating drum to form fertilizer granules, said method comprising the steps of:
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a) preparing a slurry of molten sulfur and a swelling clay;
b) dispersing into said slurry ammonium sulfate fines;
c) delivering said slurry containing ammonium sulfate fines to a falling curtain granulating drum for formation of fertilizer granules.
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Specification