Mixture for the treatment of urea-containing fertilizers

• US 8,603,211 B2
• Filed: 12/18/2008
• Issued: 12/10/2013
• Est. Priority Date: 12/22/2007
• Status: Active Grant

• Current Assignee: Fertiva GmbH (K+S AG)
• Original Assignee: Fertiva GmbH (K+S AG)
• Inventors: Rahn, Ralf-Thomas, Buehler, Gerd, Wissemeier, Alexander, Weigelt, Wolfgang
• Primary Examiner(s): LANGEL, WAYNE A
• Application Number:
  US12/809,847
• Publication Number:
  US 20110154874A1
• Time in Patent Office: 1,818 Days
• Field of Search: 252/182.3, 71/11, 71 28- 30, 71/640.7
• US Class Current: 71/11
• CPC Class Codes: C05C 9/005 Post-treatment
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: C05G 5/30 Layered or coated, e.g. dust-preventing coatings
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Abstract

A mixture for the treatment of urea-containing fertilizers comprises a) at least one (thio)phosphoric acid triamide of the general formula (I) R¹R²N—P(X)(NH₂)₂ and/or (thio)phosphoric acid diamide of the general formula (II) R¹O—P(X)(NH₂)₂, X denoting oxygen or sulfur, R¹ and R² independently from each other being hydrogen, substituted or unsubstituted 2-nitrophenyl, C_1-10-alkyl, C_3-10-cycloalkyl, C_3-10-heterocycloalkyl, C_6-10-aryl, C_6-10-heteroaryl or diaminocarbonyl, where R¹ and R² together with the nitrogen atom connecting them can also form a 5 or 6-membered saturated or unsaturated heterocyclic group, which optionally may also comprise one or two additional heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, as component A, and b) at least one compound comprising an amino group having a boiling point of more than 100° C. as component B.

Claims

1. A mixture for the treatment of urea-containing fertilizers, comprising

a) at least one (thio)phosphoric acid triamide of the general formula (I) and/or (thio)phosphoric acid diamide of the general formula (II)

R¹R²N—

P(X)(NH₂)₂ 

 

(I)

R¹O—

P(X)(NH₂)₂ 

 

(II)

with the following definitions;

X is oxygen or sulfur,

R¹ and R² independently of one another are hydrogen, in each case substituted or unsubstituted 2-nitrophenyl, C_1-10 alkyl, C_3-10 cycloalkyl, C_3-10 heterocycloalkyl, C_6-10 aryl, C_6-10 heteroaryl or diaminocarbonyl, it also being possible for R¹ and R², together with the nitrogen atom joining them, to form a 5- or 6-membered saturated or unsaturated heterocyclic moiety, which optionally may also contain one or two further heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, as component A,

b) at least one compound containing an amino group or a substituted amino group, as component B, having a boiling point of more than 100°

C., wherein component (B) is at least one selected from the group consisting of methyldiethanolamine, tetrahydroxypropylethylenediamine, trimethylaminoethylethanolamine, N,N,N′

,N′

-tetramethyl-1,6-hexanediamine, N,N′

,N″

-tris(dimethylaminopropyl)hexahydrotriazine, 2,2′

-dimorpholinyldiethyl ether and mixtures thereof.

2. The mixture as claimed in claim 1, comprising at least one selected from the group consisting of an N-alkylthiophosphoric acid triamide wherein X=S and R²=H and an N-alkylphosphoric acid wherein X=O and R²=H.

3. The mixture as claimed in claim 1, further comprising a solvent for the (thio)phosphoric acid triamides, as component C.

4. The mixture as claimed in claim 1, further comprising a polymer in dissolved or dispersed form as component D.

5. An additive or coating material for urea-containing nitrogen fertilizers comprising the mixture of claim 1.

6. The additive or coating material of claim 5 wherein the mixture is spread in the form of a formulation, solution or dispersion separately or simultaneously with the fertilizer or is incorporated into the fertilizer or is applied to the fertilizer.

7. A urea-containing fertilizer comprising a mixture as claimed in claim 1, wherein the total amount of component A, based on the urea present, is 0.001% to 0.5% by weight.

8. The urea-containing fertilizer as claimed in claim 7, wherein the mixture is applied to the surface of the urea-containing fertilizer.

9. The mixture of claim 1, wherein component (B) has a boiling point of more than 150°

C.

10. The mixture of claim 1, wherein component (B) has a boiling point of more than 200°

C.

11. The mixture of claim 1, wherein component (B) is a tertiary amine in polymeric form.

12. The mixture of claim 1, wherein component (B) is present in the mixture in an amount of 0.5 to 3 times the molar amount of component (a).

13. The mixture of claim 1, comprising an N-n-butylthiophosphoric acid triamide in an amount of 40-95% by weight of component A.

14. A urea-containing fertilizer comprising the mixture of claim 1 in an amount of 0.1 to 30% by weight based on the total weight of the fertilizer.

15. A urea-based fertilizer in granulate form, comprising:

the mixture of claim 1,

wherein the mixture is present as a coating on the surface of the urea-based fertilizer and comprises at least one N-n-butylthiophosphoric acid triamide and methyldiethanolamine.

16. An organic fertilizer comprising the mixture of claim 1 in an amount effective for reducing nitrogen losses during storage of the organic fertilizer in liquid form and/or for lowering the ammonia load in an animal stable.

17. The mixture of claim 1, wherein the component (B) is a non-salt compound.

18. A mixture for the treatment of urea-containing fertilizers, comprising

a) at least one (thio)phosphoric acid triamide of the general formula (I) and/or (thio)phosphoric acid diamide of the general formula (II)

R¹R²N—

P(X)(NH₂)₂ 

 

(I)

R¹O—

P(X)(NH₂)₂ 

 

(II)

with the following definitions;

X is oxygen or sulfur,

R¹ and R² independently of one another are hydrogen, in each case substituted or unsubstituted 2-nitrophenyl, C_1-10 alkyl, C_3-10 cycloalkyl, C_3-10 heterocycloalkyl, C_6-10 aryl, C_6-10 heteroaryl or diaminocarbonyl, it also being possible for R¹ and R², together with the nitrogen atom joining them, to form a 5- or 6-membered saturated or unsaturated heterocyclic moiety, which optionally may also contain one or two further heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, as component A,

b) at least one compound containing a substituted amino group, as component B, having a boiling point of more than 100°

C., wherein component (B) comprises at least one secondary or tertiary amine.