Fertilizer composition and methods of making and using same

Patent metadata

Field	Value
Publication number	US-10689306-B2
Application number	US-201615746096-A
Country	US
Kind code	B2
Filing date	Jul 18, 2016
Priority date	Jul 20, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

In accordance with the present invention, disclosed herein is a fertilizer core particle and fertilizer granule. The fertilizer core particle has one or more fertilizer additives, one or more binders comprising a wax, and one or more pH buffering agents, and wherein the core particle comprises from about 10 wt % to about 99 wt % of the one or more binders comprising a wax.

First claim

What is claimed is:

1. A fertilizer granule comprising a core particle having an outer surface coated with a first nitrogen containing fertilizer composition, the core particle comprising:
one or more fertilizer additives comprising a urease inhibitor or a nitrification inhibitor, or a combination thereof;
one or more binders comprising a wax; and
one or more pH buffering agents, and

wherein the core particle comprises from about 10 wt % to about 99 wt % of the one or more binders comprising a wax.

2. The fertilizer granule of claim 1 , wherein the urease inhibitor comprises N-(n-butyl) thiophosphoric triamide (NBTPT) or phenyl phosphorodiamidate (PPDA), or a combination thereof, and wherein the nitrification inhibitor comprises 3,4-dimethylpyrazole phosphate (DMPP), thio-urea (TU), dicyandiamide (DCD), 2-Chloro-6-(trichloromethyl)-pyridine (Nitrapyrin), 5-Ethoxy-3-trichloromethyl-1, 2, 4-thiadiazol (Terrazole), 2-Amino-4-chloro-6-methyl-pyrimidine (AM), 2-Mercaptobenzothiazole (MBT), or 2-Sulfanimalamidothiazole (ST), or a combination thereof.

3. The fertilizer granule of claim 1 , wherein the one or more pH buffering agents comprise CaCO 3 , MgO, KH 2 PO 4 , or NaHCO 3 , or a combination thereof.

4. The fertilizer granule of claim 1 , wherein the core particle comprises from about 60 wt % to about 90 wt % of the one or more binders comprising a wax.

5. The fertilizer granule of claim 1 , wherein the core particle comprises from about 5 wt % to about 60 wt % of the one or more pH buffering agent.

6. The fertilizer granule of claim 1 , wherein the one or more binders comprising a wax comprise a high melt wax.

7. The fertilizer granule of claim 1 , wherein the one or more binders comprising a wax comprise a low melt wax.

8. The fertilizer granule of claim 1 , wherein the fertilizer core particle comprises from 20 wt % to 50 wt % of a low melt wax or high melt wax or combination thereof, from 20 wt % to 50 wt % of a binder selected from bleached wheat flour, or starch, or a filler comprising rice husk, or a combination thereof, from 10 wt % to 30 wt % of DCD, and from more than 0 wt % to 5 wt % of NBTPT, and from about 15 wt % to about 50 wt % of the pH buffering agent.

9. The fertilizer granule of claim 8 , wherein the first nitrogen containing fertilizer composition coating the fertilizer core particle comprises urea.

10. The fertilizer granule of claim 1 , wherein the fertilizer core particle comprises a filler comprising rice husk.

11. The fertilizer granule of claim 1 , wherein the first nitrogen containing fertilizer composition coating the fertilizer core particle at least partially surrounds the fertilizer core particle.

12. The fertilizer granule of claim 1 , wherein the first nitrogen containing fertilizer composition comprises urea, ammonium nitrate, ammonium sulfate, diammonium phosphate, monoammonium phosphate, urea-formaldehyde, ammonium chloride, or potassium nitrate, or a combination thereof.

13. The fertilizer granule claim 11 , wherein the coating comprises urea.

14. A kit comprising
a) the fertilizer granule of claim 1 ; and
b) a fertilizer composition.

15. A fertilizer core particle having an outer surface and comprising:
one or more fertilizer additives;
one or more binders comprising a wax; and
one or more pH buffering agents, and

wherein the core particle comprises from about 10 wt % to about 99 wt % of the one or more binders comprising a wax and wherein the fertilizer core particle comprises from 20 wt % to 50 wt % of a low melt wax or high melt wax or combination thereof, from 20 wt % to 50 wt % of a binder selected from bleached wheat flour, or starch, or a filler comprising rice husk, or a combination thereof, from 10 wt % to 30 wt % of DCD, and from more than 0 wt % to 5 wt % of NBTPT, and from about 15 wt % to about 50 wt % of the pH buffering agent.

16. A fertilizer granule comprising the fertilizer core particle of claim 15 and an outer shell comprising urea at least partially surrounding the core particle.

17. A method for preparing the fertilizer granule of claim 1 comprising the step of:
a) extruding a mixture comprising one or more fertilizer additives, one or more binders comprising a wax, and one or more pH buffering agents, and wherein the mixture comprises from about 10 wt % to about 99 wt % of the one or more binders, thereby forming the fertilizer core particle.

18. The method of claim 17 , wherein the one or more binders comprising a wax comprise a high melt wax and the temperature of the extrusion is performed from about 80° C. to about 150° C.

19. The method of claim 17 , wherein the one or more binders comprising a wax comprise a high melt wax or a low melt wax, or a combination thereof.

20. A method for preparing a fertilizer granule of claim 1 comprising the steps of:
a) providing a core particle comprising one or more fertilizer additives, one or more binders comprising a wax, and one or more pH buffering agents, and wherein the core particle comprises from about 10 wt % to about 99 wt % of the one or more binders comprising a wax; and
b) granulating the core particle with a first nitrogen containing fertilizer composition, thereby forming a fertilizer granule.

Assignees

• Sabic Global Technologies Bv

Inventors

• Kanagalingam Sabeshan
• Hegde Ravi
• Srinivasarao Madduri
• Koripelly Rajamalleswaramma
• Gupta Samik
• Bag Nilkamal
• Burla Satish
• Gurumallappa Yoganand

Classifications

• Y02P60/21

  Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures · CPC title

• C05G5/40

  Fertilisers incorporated into a matrix · CPC title

• C05G3/90

  for affecting the nitrification of ammonium compounds or urea in the soil · CPC title

• C07F9/224

  Phosphorus triamides · CPC title

• C05G3/00

  Mixtures of one or more fertilisers with additives not having a specially fertilising activity · CPC title