Wax-based fertilizer coatings with polyethylene- or polypropylene-based polymers
US-10081578-B2 · Sep 25, 2018 · US
Fertilizer compositions and methods of making the same
US9718738B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9718738-B2 |
| Application number | US-201514627803-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 20, 2015 |
| Priority date | Feb 21, 2014 |
| Publication date | Aug 1, 2017 |
| Grant date | Aug 1, 2017 |
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Abstract
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Fertilizer compositions are provided, where a fertilizer composition includes: an inner portion including a nitrogen containing material; and an outer portion covering the inner portion, the outer portion including a release agent (e.g. HTC, BR).
First claim
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What is claimed is: 1. A fertilizer composition, comprising: an inner portion comprising a nitrogen containing compound; and an outer portion coating the inner portion, the outer portion containing (a) a release agent comprising a layered double hydroxide and (b) a release agent coating additive, wherein the outer portion comprises 5 wt. % to not greater than 30 wt. % of the fertilizer composition. 2. The fertilizer composition of claim 1 , wherein the nitrogen containing compound is urea. 3. The fertilizer composition of claim 1 , wherein the layered double hydroxide is selected from the group consisting of hydrotalcite, hydrocalumite, and combinations thereof. 4. The fertilizer composition of claim 1 , wherein the outer portion is selected from the group consisting of: of a binder, a filler, an additive; and combinations thereof. 5. The fertilizer composition of claim 1 , wherein the outer layer comprises hydrotalcite and wax. 6. A fertilizer composition, comprising: an inner portion comprising urea; and an outer portion coating the inner portion, the outer portion containing a release agent comprising a hydrocalumite, wherein the outer portion comprises 10 wt. % to not greater than 20 wt. % of the fertilizer composition. 7. The composition of claim 6 , wherein the outer portion further comprises a binder. 8. The composition of claim 7 , wherein the binder further comprises a wax in an amount not exceeding 5 wt. % of the fertilizer composition. 9. The fertilizer composition of claim 1 , wherein the release agent coating additive is selected from the group consisting of: a wax, a sugar polymer, carboxylic acid, polyelectrolytes, polymers, Portland cement, and combinations thereof. 10. The fertilizer composition of claim 1 , wherein the release agent comprises from 10 wt. % to 15 wt. % of the fertilizer composition and the release agent coating additive comprises from 2 wt. % to 3 wt. % of the total fertilizer composition. 11. The fertilizer composition of claim 1 , wherein the outer portion is configured to provide a controlled release fertilizer. 12. A fertilizer composition, comprising: an inner portion comprising urea; and an outer portion encasing the inner portion, the outer portion containing a release agent including a Bayer Process byproduct selected from the group consisting of: bauxite residue and layered double hydroxides; wherein the release agent is present in an amount of 10 wt. % to not greater than 20 wt. % of the total fertilizer composition. 13. The fertilizer composition of claim 12 , wherein the outer portion comprises 5 wt. % to 30 wt. % of the total weight of the composition. 14. The fertilizer composition of claim 12 , wherein the outer portion comprises 10 wt. % to 20 wt. % of the total weight of the composition. 15. The fertilizer composition of claim 12 , wherein the release agent is bauxite residue. 16. The fertilizer composition of claim 12 , wherein the release agent is hydrotalcite. 17. The fertilizer composition of claim 12 , wherein the release agent is configured to slow the release of urea into a growing medium.
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9718738B2 cover?
- Fertilizer compositions are provided, where a fertilizer composition includes: an inner portion including a nitrogen containing material; and an outer portion covering the inner portion, the outer portion including a release agent (e.g. HTC, BR).
- Who is the assignee on this patent?
- Alcoa Inc, Alcoa Usa Corp
- What technology area does this patent fall under?
- Primary CPC classification C05G5/38. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 01 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).