IP Library Granted Patent US 7,674,312
Granted Patent B2
US 7,674,312 · App. 12/060,644 · Granted Mar 9, 2010

Liquid fertilizing compositions

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Quick Facts
Patent No.
US 7,674,312
App. No.
12/060,644
Granted
Mar 9, 2010
Kind
B2
Abstract

Liquid fertilizer compositions and methods of making liquid fertilizer compositions are set forth herein. In one embodiment, a liquid fertilizing composition includes an aqueous ammonium chloride solution having a pH between 6.5 and 8.5, a dispersant selected from anionic polyacrylamides, and a corrosion inhibitor. In another embodiment, a liquid fertilizing composition includes an aqueous solution having a pH between 6.5 and 8.5. The solution includes at least 16.5 percent by weight of ammonium chloride and between 0.5 and 1.0 percent by weight of dispersant. In yet another embodiment, a liquid fertilizing composition has a pH between 7.5 and 8.5. The composition consists essentially of at least 16.5 percent by weight ammonium chloride, between 0.5 and 1.0 percent by weight dispersant, an effective amount of corrosion inhibitor, and water.

Claims (64)

1. A liquid fertilizing composition, comprising:

an aqueous ammonium chloride solution having a pH between 7.5 and 8.5;

an anionic polyacrylamide; and

a corrosion inhibitor.

2. The composition of claim 1 , wherein the anionic polyacrylamide is selected from the group consisting of CAS 25987-30-8 and CAS 25085-02-3.

3. The composition of claim 1 , wherein the anionic polyacrylamide is CAS 25987-30-8.

4. The composition of claim 3 , wherein the anionic polyacrylamide has a concentration between 0.5 and 1.0 percent by weight of the composition.

5. A liquid fertilizing composition, comprising:

an aqueous ammonium chloride solution having a pH between 7.5 and 8.5; and

an anionic polyacrylamide;

wherein the anionic polyacrylamide is present between 0.5 and 1.0 percent by weight.

6. The composition of claim 5 , further comprising an effective amount of a corrosion inhibitor.

7. The composition of claim 6 , wherein:

the anionic polyacrylamide includes at least one member selected from the group consisting of CAS 25987-30-8 and CAS 25085-02-3;

the corrosion inhibitor is present between 0 and 0.1 percent by weight; and

the corrosion inhibitor includes at least one member selected from the group consisting of:

(a) urea;

(b) corn steep liquor;

(c) glycerol; and

(d) organic sulfonate.

8. A liquid fertilizing composition, comprising an aqueous solution of:

at least 16.5% by weight ammonium chloride; and

0.5-1.0% by weight dispersant;

wherein the aqueous solution has a pH between 7.5 and 8.5.

9. The composition of claim 8 , wherein the dispersant includes an anionic polyacrylamide.

10. The composition of claim 8 , wherein at least one constituent of the dispersant is selected from the group consisting of CAS 25987-30-8 and CAS 25085-02-3.

11. The composition of claim 8 , wherein the dispersant is CAS 25987-30-8.

12. The composition of claim 8 , wherein the solution is aqueous at temperatures higher than ten degrees Fahrenheit.

13. The composition of claim 8 , wherein the ammonium chloride is obtained from a waste source and the solution includes impurities.

14. The composition of claim 8 , further comprising a corrosion inhibitor.

15. The composition of claim 14 , wherein:

the corrosion inhibitor is present between 0 and 0.1 percent by weight; and

at least one constituent of the corrosion inhibitor is selected from the group consisting of:

(a) urea;

(b) corn steep liquor; and

(c) glycerol and organic sulfonate.

16. A liquid fertilizing composition, consisting essentially of:

Constituent

Weight %

ammonium chloride

at least 16.5

dispersant

0.5-1.0

corrosion inhibitor

effective amount

water

balance

and wherein the composition has a pH between 7.5 and 8.5.

17. The composition of claim 16 , wherein the dispersant comprises an anionic polyacrylamide.

18. A method of reducing a salt-out temperature and corrosivity of a liquid fertilizer having an initial pH less than 7.5, at least 16.5 percent by weight ammonium chloride, and between 0.5 and 1.0 percent by weight of at least one anionic polyacrylamide; the method comprising:

raising the initial pH of the liquid fertilizer to a final pH between 7.5 and 8.5; and

adding a corrosion inhibitor to the liquid fertilizer.

19. The method of claim 18 , wherein:

the corrosion inhibitor is present in a concentration between 0 and 0.1 percent by weight; and

at least one constituent of the corrosion inhibitor is selected from the group consisting of:

(a) urea;

(b) corn steep liquor;

(c) glycerol; and

(d) organic sulfonate.

20. The composition of claim 1 , wherein at least one constituent of the corrosion inhibitor is selected from the group consisting of:

(a) urea;

(b) corn steep liquor;

(c) glycerol; and

(d) organic sulfonate.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 29, 2019
From: EVANS ENTERPRISES, LLC
To: UNITED SUPPLIERS, INC.
Reel/Frame 049308/0876 →
MERGER Recorded May 29, 2019
From: UNITED SUPPLIERS, INC.
To: WINFIELD US HOLDINGS, LLC
Reel/Frame 049308/0967 →
MERGER Recorded May 29, 2019
From: WINFIELD US HOLDINGS, LLC
To: WINFIELD SOLUTIONS, LLC
Reel/Frame 049309/0020 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 2, 2016
From: EVANS, BRYAN D.
To: EVANS ENTERPRISES, LLC
Reel/Frame 039310/0179 →
Continuity (2)
Provisional Application 6097163500 · Sep 12, 2007
Related Publication 20090064747A1 · Mar 12, 2009