Reaction products and methods for making and using the same

Patent metadata

Field	Value
Publication number	US-11148982-B2
Application number	US-201816164198-A
Country	US
Kind code	B2
Filing date	Oct 18, 2018
Priority date	Apr 30, 2010
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

Reaction products and methods for making and using the same are provided. In at least one specific embodiment, the fertilizer can include a nitrogen source comprising urea, ammonia, ammonium nitrate, or any combination thereof and a reaction product of formaldehyde, an ammonia source, and a nitrification inhibitor.

First claim

What is claimed is:

1. A method for producing a fertilizer, comprising:
reacting formaldehyde, an ammonia source, urea, and a nitrification inhibitor to produce a reaction product comprising the formaldehyde, ammonia, urea, and nitrification inhibitor; and
combining the reaction product with one or more nitrogen sources to produce the fertilizer;
wherein the amount of the reaction product in the fertilizer ranges from about 0.5 wt % to about 20 wt %, based on the total amount of nitrogen in the one or more nitrogen sources in the fertilizer.

2. The method of claim 1 , wherein the one or more nitrogen sources comprise urea, urea-formaldehyde polymers, anhydrous ammonia, aqueous ammonia, ammonium nitrate, or a combination thereof.

3. The method of claim 1 , wherein the ammonia source is ammonium hydroxide, ammonium chloride, ammonium nitrate, anhydrous ammonia, aqueous ammonia, or a combination thereof.

4. The method of claim 1 , wherein the nitrification inhibitor is 2-chloro-6-(trichloromethyl)-pyridine; 5-ethoxy-3-trichloromethyl-1,2,4-thiadiazol; dicyandiamide (DCD); 2-amino-4-chloro-6-methyl-pyrimidine; 1,3-benzothiazole-2-thiol; 4-amino-N-1,3-thiazol-2-ylbenzenesulfonamide; thiourea; guanidine; 3,4-dimethylpyrazophosphate; 2,4-diamino-6-trichloromethyl-5-triazine; polyetherionophores; 4-amino-1,2,4-triazole; 3-mercapto-1,2,4-triazole; potassium azide; carbon bisulfide; sodium trithiocarbonate; ammonium dithiocarbamate; 2,3, dihydro-2,2-dimethyl-7-benzofuranol methyl-carbamate; N-(2,6-dimethylphenyl)-N-(methoxyacetyl)-alanine methyl ester; ammonium thiosulfate; 1-hydroxypyrazole; 2-methylpyrazole-1-carboxamide; derivatives thereof, or any combination thereof.

5. The method of claim 1 , wherein the nitrogen source is a solid.

6. The method of claim 1 , wherein the nitrogen source is a liquid.

7. The method of claim 1 , wherein the nitrogen source is a mixture of a solid nitrogen source and a liquid nitrogen source.

8. The method of claim 1 , wherein the reaction product has a pH ranging from about 4 to about 6.

9. The method of claim 1 , wherein the formaldehyde, the ammonia source, urea, and the nitrification inhibitor are reacted under alkaline reaction conditions to produce a reaction product having a pH ranging from about 8 to about 11.

10. The method of claim 1 , wherein the formaldehyde, the ammonia source, urea, and the nitrification inhibitor are reacted in water under alkaline reaction conditions to produce an aqueous reaction product.

11. The method of claim 1 , wherein reacting the formaldehyde, ammonia source, urea, and nitrification inhibitor comprises:
combining the formaldehyde and the nitrification inhibitor at a molar ratio of from about 1:1 to about 3:1 to produce a first mixture;
heating the first mixture to a temperature ranging from about 50° C. to about 80° C.;
adding the urea to the first mixture;
introducing an ammonia source to the first mixture to produce a second mixture, wherein the total amount of ammonia source introduced to the first mixture provides a formaldehyde to ammonia source molar ratio ranging from about 3:1 to about 9:1; and
heating the second mixture to a temperature ranging from about 70° C. to about 90° C.; and cooling the second mixture to produce the reaction product.

12. The method of claim 1 , wherein a molar ratio of the formaldehyde to ammonia in the reaction product ranges from about 3:1 to about 9:1 and a molar ratio of the formaldehyde to nitrification inhibitor in the reaction product ranges from about 1:1 to about 3:1.

13. The method of claim 1 , wherein the reaction product comprises:
from about 30 mol % to about 70 mol % formaldehyde;
from about 5 mol % to about 25 mol % ammonia source; and
from about 15 mol % to about 45 mol % nitrification inhibitor;
based on the total weight of the formaldehyde, the ammonia source, and the nitrification inhibitor.

14. The method of claim 1 , wherein a molar ratio of the formaldehyde to the ammonia source in the reaction product ranges from about 1:1 to about 1:8 and a molar ratio of the formaldehyde to nitrification inhibitor in the reaction product ranges from about 1:1 to about 7:1.

15. The method of claim 1 , wherein the formaldehyde comprises an aqueous solution, and wherein the concentration of the formaldehyde in the aqueous solution ranges from about 37% to about 50%.

16. The method of claim 1 , wherein a concentration of the nitrification inhibitor in the fertilizer ranges from about 0.1 wt % to about 20 wt %, based on a total amount of nitrogen in the one or more nitrogen sources in the fertilizer.

17. The method of claim 1 , wherein a concentration of the nitrification inhibitor in the fertilizer ranges from about 1 wt % to about 10 wt %, based on a total amount of nitrogen in the one or more nitrogen sources in the fertilizer.

18. The method of claim 1 , further comprising one or more urease inhibitors, wherein the urease inhibitor is N-(n-butyl)thiophosphoric triamide, N-(butyl)phosphoric triamide, thiophosphoryl triamide, phenyl phophorodiamidate, cyclohexyl phosphoric triamide, cyclohexyl thiophosphoric triamide, phosphoric triamide, hydroquinone, p-benzoquinone, hexamidocyclotriphophazene, thiophyridines, thiophyrimidines, thiophyridine-N-oxides, N,N-dihalo-2-imidazolidinone, N-halo-2-oxazolidinone, derivatives thereof, or any combination thereof.

19. The method of claim 1 , wherein the reaction product further comprises a urease inhibitor reacted with the formaldehyde, ammonia source, urea, and nitrification inhibitor.

20. The method of claim 1 , wherein the fertilizer is further mixed with a fertilizer nutrient, pesticide, herbicide, fungicide, or combination thereof.

Assignees

• Koch Agronomics Services Llc
• Koch Agronomic Services Llc

Inventors

• Gabrielson Kurt D
• Epling Mary L

Classifications

• Y02P60/21

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

• C05C3/00 Primary

  Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor · CPC title

• C05C9/02

  containing urea-formaldehyde condensates · CPC title

• C05G3/90 Primary

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

• C05C9/00

  Fertilisers containing urea or urea compounds · CPC title