LIQUID DICYANDIAMIDE AND/OR ALKYL THIOPHOSPHORIC TRIAMIDE COMPOSITIONS AND THEIR USE IN AGRICULTURAL APPLICATIONS

• US 20140174140A1
• Filed: 12/20/2013
• Published: 06/26/2014
• Est. Priority Date: 12/20/2012
• Status: Active Grant

• Current Assignee: Specialty Operations France
• Original Assignee: Rhodia Operations (Solvac SA)
• Inventors: SHANMUGA, Krish, ORTIZ-SUAREZ, Marivi, RUCH, Thomas
• Granted Patent: US 9,266,789 B2
• Time in Patent Office: Days
• US Class Current: 71/27
• CPC Class Codes: C05C 11/00 Other nitrogenous fertilisers
• CPC Class Codes: C05C 7/00 Fertilisers containing calcium or other cyanamides
• CPC Class Codes: C05C 9/00 Fertilisers containing urea or urea compounds
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Abstract

An inhibitor composition contains dicyandiamide as a nitrification inhibitor, alkyl thiophosphoric triamide as a urease inhibitor, or a combination thereof, dissolved in a liquid medium comprising an organic solvent selected from, among others, one or more polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, is useful in making fertilizer compositions and in a method of fertilizing target plants.

Claims

1. A composition for use in agricultural applications comprising at least one of a dicyandiamide or an alkyl thiophosphoric triamide, dissolved in a liquid medium comprising an organic solvent comprising a polar aprotic solvent, an amine solvent, a heterocyclic alcohol solvent or a mixture thereof.

2. The composition of claim 1 wherein the alkyl thiophosphoric triamide is N-(n-butyl)-thiophosphoric triamide.

3. The composition of claim 1 wherein the organic solvent comprises:

(a) at least one dioxolane compound of formula (Ia);

4. The composition of claim 1 wherein the organic solvent is dimethyl sulfoxide.

5. The composition of claim 1 wherein the polar aprotic solvent is selected from the group consisting of dichloromethane, dimethyl acetamide, dimethyl formamide, dimethyl sulfoxide, ethyl acetate, hexamethylphosphoramide, dimethyl sulfone, sulfolane, 1,3-dimethyl-2-imidazoidinone, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidone, methyl acetate, ethyl lactate, methylpyrrolidone, tetrahydrofuran, propylene carbonate, and dibasic ester solvents.

6. A method of making a solid or concentrated liquid fertilizer composition comprising treating one or more nitrogenous fertilizer compounds with an inhibitor composition that comprises at least one of a dicyandiamide or an alkyl thiophosphoric triamide, the inhibitor composition dissolved in a liquid medium comprising an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof.

7. The method of claim 6 wherein the alkyl thiophosphoric triamide is N-(n-butyl)-thiophosphoric triamide.

8. The method of claim 6 wherein the solvent comprises:

(a) at least one dioxolane compound of formula (Ia);

9. The method of claim 6 wherein the organic solvent is dimethyl sulfoxide.

10. The method of claim 6 wherein the polar aprotic solvent is selected from the group consisting of dichloromethane, dimethyl acetamide, dimethyl formamide, dimethyl sulfoxide, ethyl acetate, hexamethylphosphoramide, dimethyl sulfone, sulfolane, 1,3-dimethyl-2-imidazoidinone, 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidone, methyl acetate, ethyl lactate, methylpyrrolidone, tetrahydrofuran, propylene carbonate, and dibasic ester solvents.

11. A concentrated liquid fertilizer composition comprising, based on 100 parts by weight of the composition:

(a) up to about 99 parts by weight of one or more nitrogenous fertilizer compounds,

(b) at least one of a dicyandiamide or an alkyl thiophosphoric triamide,

(c) an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, and

(d) water.

12. The liquid fertilizer composition of claim 11 wherein the organic solvent comprises:

(a) at least one dioxolane compound of formula (Ia);

12-1. A solid fertilizer composition comprising:

(a) solid particles of one or more nitrogenous fertilizer compounds, and

(b) an inhibitor composition comprising at least one of a dicyandiamide or an alkyl thiophosphoric triamide supported on at least a portion of the solid particles.

13. A method of making an aqueous end use fertilizer composition comprising incorporating:

(a) one or more nitrogenous fertilizer compounds, and

(b) an inhibitor composition that comprises at least one of a dicyandiamide or an alkyl thiophosphoric triamide, the inhibitor composition dissolved in a liquid medium comprising an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof,

in an aqueous medium.

14. The method of claim 13 wherein the organic solvent comprises:

(a) at least one dioxolane compound of formula (Ia);

15. An aqueous end use fertilizer composition comprising, based on 100 parts by weight of the composition:

(a) up to about 99 parts by weight of one or more nitrogenous fertilizer compounds,

(b) at least one of a dicyandiamide or an alkyl thiophosphoric triamide,

(c) an organic solvent selected from polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, and

(d) water.

16. A method for fertilizing target plants, comprising applying an aqueous end use fertilizer composition that comprises:

(a) one or more nitrogenous fertilizer compounds

(b) at least one of a dicyandiamide or an alkyl thiophosphoric triamide,

(c) an organic solvent selected from dimethyl sulfoxide, dimethyl formamide, the dimethyl ester of succinic acid, dimethyl ester of ethyl succinic acid, the dimethyl ester of glutaric acid, the dimethyl ester of methyl glutaric acid, and the dimethyl ester of adipic acid, diethylene triamine, or monoethanolamine, methyl-5-(dimethylamino)-2-methyl-oxopentanoate, dimethylaminoethanol, triethanol amine, a heterocyclic alcohol according to structure (III);