STABILIZED DCD AND/OR ALKYL THIOPHOSPHORIC TRIAMIDE SOLVENT SYSTEMS AND USE IN AGRICULTURAL APPLICATIONS

• US 20190100472A1
• Filed: 12/03/2018
• Published: 04/04/2019
• Est. Priority Date: 06/29/2016
• Status: Active Grant

• Current Assignee: Specialty Operations France
• Original Assignee: Rhodia Operations (Solvac SA)
• Inventors: LIU, Hong, WU, Jiamin, GOMES, Andre, SHANMUGA, Krish, CHEN, Zhiyun
• Granted Patent: US 10,570,068 B2
• Time in Patent Office: Days
• CPC Class Codes: C05B 7/00 Fertilisers based essentially on alkali or ammonium orthophosphates C05B11/00 takes precedence
• CPC Class Codes: C05C 1/00 Ammonium nitrate fertilisers
• CPC Class Codes: C05C 11/00 Other nitrogenous fertilisers
• CPC Class Codes: C05C 9/00 Fertilisers containing urea or urea compounds
• CPC Class Codes: C05C 9/02 containing urea-formaldehyde condensates
• CPC Class Codes: C05G 3/90 for affecting the nitrification of ammonium compounds or urea in the soil
• CPC Class Codes: C05G 5/23 Solutions
• CPC Class Codes: C07F 9/224 Phosphorus triamides
• CPC Class Codes: C09K 15/12 containing sulfur and oxygen
• CPC Class Codes: C09K 15/18 containing an amine or imine moiety
• CPC Class Codes: C09K 15/28 containing nitrogen, oxygen and sulfur
• CPC Class Codes: C09K 15/324 containing phosphorus and sulfur
• CPC Class Codes: Y02P 60/21 Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures

Abstract

An inhibitor composition contains alkyl thiophosphoric triamide (or a mixture of alkyl thiophosphoric triamide and dicyandiamide),dissolved in a liquid medium comprising at least one organic solvent, at least one amine stabilizer and, optionally, at least one dye and/or at least one odor masking agent, is useful in making fertilizer compositions and in a method of fertilizing target plants.

Claims

1. A stable liquid agricultural composition comprisingto 40 wt. % at least one urease inhibitor, wherein the urease inhibitor comprises alkyl thiophosphoric triamide;

a solvent blend comprising a mixture of triethylene glycol and polypropylene glycol;

optionally, dimethyl sulfoxide;

optionally, at least one nitrification inhibitor;

optionally, at least one co-solvent selected from the group consisting of;

(a) at least one dioxolane compound of formula (II.b);

2. The liquid agricultural composition of claim 1, wherein the urease inhibitor is present in an amount of from 14 wt % to 40 wt %, by weight of composition.

3. The liquid agricultural composition of claim 2, wherein urease inhibitor is present in an amount of from 14 wt % to 35 wt %, by weight of composition.

4. The liquid agricultural composition of claim 1, wherein the urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT).

5. The liquid agricultural composition of claim 1, further comprising at least one nitrification inhibitor.

6. The liquid agricultural composition of claim 5, wherein the nitrification inhibitor is dicyandiamide (DCD).

7. The liquid agricultural composition of claim 1, further comprising at least one dye.

8. The liquid agricultural composition of claim 1, further comprising an odor masking agent comprising at least one of terpineol, 4-allylanisole, limonene4-(2,6,6-Trimethyl-2-cyclohexenyl)-3-buten-2-one, isoamyl butyrate, benzaldehyde, diethyl malonate, cyclohexyl acetate, anisole, mint, oil Japanese cherry, or α

-Ionone.

9. The liquid agricultural composition of claim 1, having an absence of

co solvent which is the at least one compound according to formula (I.a):

10. The liquid agricultural composition of claim 1,

comprising:

the at least one urease inhibitor;

the dimethyl sulfoxide;

-optionally, the at least one co-solvent selected from;

(a) at least one dioxolane compound of formula (II.b);

11. The liquid agricultural composition of claim 1, comprising at least 60 wt. % organic solvent comprising the solvent blend, optionally dimethylsulfoxide, and optionally co-solvent.

12. The liquid agricultural composition of claim 1, further comprising an amine stabilizer according to formula (IV):

13. The liquid agricultural composition of claim 12, wherein the amine stabilizer is 2-amino-2-methyl-1-propanol, amino-2-propanol, 2-amino-1-butanol or mixtures thereof.

14. The liquid agricultural composition of claim 1, wherein the at least one urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT) present in an amount of 14 to 35 wt %, by total weight of the composition.

15. The liquid agricultural composition of claim 1, wherein the at least one urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT) present in an amount 14 to 30 wt %, by total weight of the composition.

16. The liquid agricultural composition of claim 1, wherein the at least one urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT) present in an amount of 14 to 25 wt %, by total weight of the composition.

17. The liquid agricultural composition of claim 1, wherein the at least one urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT) present in an amount of 20 to 30 wt %, by total weight of the composition.

18. The liquid agricultural composition of claim 1, wherein the at least one urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT) present in an amount of 20 to 25 wt %, by total weight of the composition.

19. The liquid agricultural composition of claim 1, comprising 60 to 80 wt. % organic solvent comprising the solvent blend, optionally dimethylsulfoxide, and optionally co-solvent.

20. The liquid agricultural composition of claim 12, wherein the amine stabilizer is present in an amount less than 4% by total weight of the liquid fertilizer composition.

23. A method of making a solid or concentrated liquid fertilizer composition comprising contacting one or more nitrogenous fertilizer compounds with a liquid inhibitor composition of claim 1 that comprises 10 to 40 wt. % alkyl thiophosphoric triamide urease inhibitor, which is dissolved or dispersed in a liquid medium comprising:

the solvent blend comprising a mixture of triethylene glycol and polypropylene glycol.

24. The method of claim 23,. wherein the liquid medium comprising further comprises an odor masking agent comprising at least one of terpineol, 4-allylanisole, limonene4-(2,6,6-Trimethyl-2-cyclohexenyl)-3-buten-2-one, isoamyl butyrate, benzaldehyde, diethyl malonate, cyclohexyl acetate, anisole, mint, oil Japanese cherry, or α

-Ionone.

21-22. -22. (canceled)

25. A stable liquid agricultural composition comprising, by weight of composition:

greater than 25 to less than 30 wt % of a urease inhibitor;

a solvent blend comprising a) a mixture of triethylene glycol and b) propylene glycol;

optionally, a dye; and

optionally, an odor masking agent.

26. The liquid agricultural composition of claim 25, wherein the wherein the urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT).

27. A stable liquid agricultural composition comprising, by weight of composition:

10 to less than 30 wt % of a urease inhibitor;

a solvent blend comprising a mixture of glycol derivatives;

optionally, a dye; and

optionally, an odor masking agent.

28. The liquid agricultural composition of claim 27, wherein the mixture of glycol derivatives comprises triethylene glycol and propylene glycol.

29. The liquid agricultural composition of claim 28, wherein the urease inhibitor is N-(n-butyl)-thiophosphoric triamide (NBPT).